Handle Oauth2 ImplementationUnavailableError in microbees

[wmoss]

Proposed change

As described in much more detail in PR #154579 and this blog post, previously, if there was no internet and the call to fetch cloud services fail, integrations like this one using cloud oauth2 would terminally fail. #154579 introduced config_entry_oauth2_flow.ImplementationUnavailableError and raises it in that specific case. This catches that error and raises ConfigEntryNotReady so that the configuration will be retried when internet is available again.

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 #
• This PR is related to issue: Fix account link no internet on startup #154579
• Link to documentation pull request:
• Link to developer documentation pull request:
• Link to frontend pull request:

Checklist

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[home-assistant]

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[Copilot]

Pull request overview

Updates the microbees integration to handle the new OAuth2 “implementation unavailable” error so entries don’t fail permanently when cloud services can’t be fetched (e.g., no internet), and verifies this behavior with a regression test.

Changes:

• Catch config_entry_oauth2_flow.ImplementationUnavailableError during setup and raise ConfigEntryNotReady to trigger retry.
• Add integration exception translation key oauth2_implementation_unavailable wired to the common message.
• Add a test asserting the config entry moves to SETUP_RETRY when the OAuth implementation cannot be loaded.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
homeassistant/components/microbees/__init__.py	Converts OAuth implementation unavailability into ConfigEntryNotReady with translated message.
homeassistant/components/microbees/strings.json	Adds exceptions.oauth2_implementation_unavailable translation mapping to the common string.
tests/components/microbees/test_init.py	Adds regression test ensuring setup retries on ImplementationUnavailableError.