Do not trigger reauth for addon in Music Assistant

[arturpragacz]

Proposed change

Do not trigger reauth for addon in Music Assistant.

When running as addon, there is no possibility for users to reauthenticate manually.
Instead we should wait until addon discovery provides us with the right token and reloads the config entry.

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 PR fixes or closes issue: fixes #
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[home-assistant]

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

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[marcelveldt]

Thanks, @arturpragacz !

[Copilot]

Pull request overview

This PR prevents the Music Assistant integration from triggering a reauthentication flow when running as a Home Assistant addon and encountering authentication errors. Instead, it waits for addon discovery to provide the correct token and reload the config entry automatically, since users cannot manually reauthenticate when the integration runs as an addon.

Key Changes:

• Adds logic to detect addon mode and raise ConfigEntryError instead of ConfigEntryAuthFailed for authentication failures
• Includes ConfigEntryState.SETUP_IN_PROGRESS in the list of states that trigger config entry reload during addon discovery
• Adds test coverage for the new addon authentication behavior

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
homeassistant/components/music_assistant/init.py	Added check to prevent reauth flow for addons by raising ConfigEntryError instead of ConfigEntryAuthFailed when homeassistant_addon is true
homeassistant/components/music_assistant/config_flow.py	Added ConfigEntryState.SETUP_IN_PROGRESS to the list of states that trigger reload during hassio discovery
tests/components/music_assistant/test_init.py	Added test to verify no reauth is triggered for addons and cleaned up comment formatting in existing test