Add transmission download path to events + add_torrent service

[DrBlokmeister]

Proposed change

1. Add download path to transmission add_torrent service.
2. Add download path to transmission torrent events.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This is my first HA PR and second ever PR. If I have made mistakes, please let me know what to do to fix them.
• PR is not related to issue.
• No documentation PR yet. Would require update to https://www.home-assistant.io/integrations/transmission/#service-add_torrent

Checklist

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
• I have followed the perfect PR recommendations
• The code has been formatted using Ruff (ruff format homeassistant tests)
• Tests have been added to verify that the new code works.

ha-venvvscode ➜ /workspaces/HA_core (transmission-download-path) $ pre-commit run --files /workspaces/HA_core/homeassistant/components/transmission/*       
ruff.....................................................................Passed
ruff-format..............................................................Passed
codespell................................................................Passed
check json...............................................................Passed
don't commit to branch...................................................Passed
yamllint.................................................................Passed
prettier.................................................................Passed
mypy.....................................................................Passed
pylint...................................................................Passed
gen_requirements_all.....................................................Passed
hassfest.................................................................Passed
hassfest-metadata....................................(no files to check)Skipped
hassfest-mypy-config.................................(no files to check)Skipped

ha-venvvscode ➜ /workspaces/HA_core (transmission-download-path) $ pytest ./tests/components/transmission --cov=homeassistant.components.transmission --cov-report term-missing -vv
Test session starts (platform: linux, Python 3.12.3, pytest 8.2.0, pytest-sugar 1.0.0)
cachedir: .pytest_cache
rootdir: /workspaces/HA_core
configfile: pyproject.toml
plugins: mock-3.14.0, typeguard-4.0.1, rerunfailures-14.0, socket-0.7.0, sugar-1.0.0, pytest_freezer-0.4.8, requests-mock-1.12.1, timeout-2.3.1, cov-5.0.0, aiohttp-1.0.5, syrupy-4.6.1, xdist-3.6.1, picked-0.5.0, unordered-0.6.0, respx-0.21.1, asyncio-0.23.6, github-actions-annotate-failures-0.2.0, anyio-4.4.0
asyncio: mode=Mode.AUTO
collected 27 items                                                                                                                                                                                                                                                                                                                        

 tests/components/transmission/test_config_flow.py::test_form ✓                                                                                                                                                                                                                                                               4% ▍         
 tests/components/transmission/test_config_flow.py::test_device_already_configured ✓                                                                                                                                                                                                                                          7% ▊         
 tests/components/transmission/test_config_flow.py::test_options ✓                                                                                                                                                                                                                                                           11% █▎        
 tests/components/transmission/test_config_flow.py::test_error_on_wrong_credentials ✓                                                                                                                                                                                                                                        15% █▌        
 tests/components/transmission/test_config_flow.py::test_unexpected_error ✓                                                                                                                                                                                                                                                  19% █▉        
 tests/components/transmission/test_config_flow.py::test_error_on_connection_failure ✓                                                                                                                                                                                                                                       22% ██▎       
 tests/components/transmission/test_config_flow.py::test_reauth_success ✓                                                                                                                                                                                                                                                    26% ██▋       
 tests/components/transmission/test_config_flow.py::test_reauth_failed ✓                                                                                                                                                                                                                                                     30% ██▉       
 tests/components/transmission/test_config_flow.py::test_reauth_failed_connection_error ✓                                                                                                                                                                                                                                    33% ███▍      
 tests/components/transmission/test_init.py::test_successful_config_entry ✓                                                                                                                                                                                                                                                  37% ███▊      
 tests/components/transmission/test_init.py::test_config_flow_entry_migrate_1_1_to_1_2 ✓                                                                                                                                                                                                                                     41% ████▏     
 tests/components/transmission/test_init.py::test_setup_failed_connection_error ✓                                                                                                                                                                                                                                            44% ████▌     
 tests/components/transmission/test_init.py::test_setup_failed_auth_error ✓                                                                                                                                                                                                                                                  48% ████▊     
 tests/components/transmission/test_init.py::test_setup_failed_unexpected_error ✓                                                                                                                                                                                                                                            52% █████▎    
 tests/components/transmission/test_init.py::test_unload_entry ✓                                                                                                                                                                                                                                                             56% █████▋    
 tests/components/transmission/test_init.py::test_migrate_unique_id[sensor-0.0.0.0-Transmission Down Speed-1234-download] ✓                                                                                                                                                                                                  59% █████▉    
 tests/components/transmission/test_init.py::test_migrate_unique_id[sensor-0.0.0.0-Transmission Up Speed-1234-upload] ✓                                                                                                                                                                                                      63% ██████▍   
 tests/components/transmission/test_init.py::test_migrate_unique_id[sensor-0.0.0.0-Transmission Status-1234-status] ✓                                                                                                                                                                                                        67% ██████▋   
 tests/components/transmission/test_init.py::test_migrate_unique_id[sensor-0.0.0.0-Transmission Active Torrents-1234-active_torrents] ✓                                                                                                                                                                                      70% ███████▏  
 tests/components/transmission/test_init.py::test_migrate_unique_id[sensor-0.0.0.0-Transmission Paused Torrents-1234-paused_torrents] ✓                                                                                                                                                                                      74% ███████▌  
 tests/components/transmission/test_init.py::test_migrate_unique_id[sensor-0.0.0.0-Transmission Total Torrents-1234-total_torrents] ✓                                                                                                                                                                                        78% ███████▊  
 tests/components/transmission/test_init.py::test_migrate_unique_id[sensor-0.0.0.0-Transmission Completed Torrents-1234-completed_torrents] ✓                                                                                                                                                                                81% ████████▎ 
 tests/components/transmission/test_init.py::test_migrate_unique_id[sensor-0.0.0.0-Transmission Started Torrents-1234-started_torrents] ✓                                                                                                                                                                                    85% ████████▌ 
 tests/components/transmission/test_init.py::test_migrate_unique_id[sensor-1234-started_torrents-1234-started_torrents] ✓                                                                                                                                                                                                    89% ████████▉ 
 tests/components/transmission/test_init.py::test_migrate_unique_id[switch-0.0.0.0-Transmission Switch-1234-on_off] ✓                                                                                                                                                                                                        93% █████████▍
 tests/components/transmission/test_init.py::test_migrate_unique_id[switch-0.0.0.0-Transmission Turtle Mode-1234-turtle_mode] ✓                                                                                                                                                                                              96% █████████▋
 tests/components/transmission/test_init.py::test_migrate_unique_id[switch-1234-turtle_mode-1234-turtle_mode] ✓                                                                                                                                                                                                             100% ██████████

---------- coverage: platform linux, python 3.12.3-final-0 -----------
Name                                                   Stmts   Miss  Cover   Missing
------------------------------------------------------------------------------------
homeassistant/components/transmission/config_flow.py      59      0   100%
homeassistant/components/transmission/const.py            34      0   100%
homeassistant/components/transmission/errors.py            4      0   100%
------------------------------------------------------------------------------------
TOTAL                                                     97      0   100%


Results (2.51s):
      27 passed

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io
  • No. Would require an update to: https://www.home-assistant.io/integrations/transmission/#service-add_torrent to be complete. However, that's in a separate repository, so that would require a separate PR, right?

If the code communicates with devices, web services, or third-party tools:

• The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• For the updated dependencies - a link to the changelog, or at minimum a diff between library versions is added to the PR description.

To help with the load of incoming pull requests:

• I have reviewed two other open pull requests in this repository.
  • Skipped as this is my first PR and don't know enough to be an adequate reviewer.

[home-assistant]

Hey there @engrbm87, @JPHutchins, mind taking a look at this pull request as it has been labeled with an integration (transmission) you are listed as a code owner for? Thanks!

Code owner commands

Code owners of transmission can trigger bot actions by commenting:

• @home-assistant close Closes the pull request.
• @home-assistant rename Awesome new title Renames the pull request.
• @home-assistant reopen Reopen the pull request.
• @home-assistant unassign transmission Removes the current integration label and assignees on the pull request, add the integration domain after the command.
• @home-assistant add-label needs-more-information Add a label (needs-more-information, problem in dependency, problem in custom component) to the pull request.
• @home-assistant remove-label needs-more-information Remove a label (needs-more-information, problem in dependency, problem in custom component) on the pull request.