Breaking change

Proposed change

The available override only looked at the lamp state and mode, so the entities stayed available with stale data after a failed update. It now also checks super().available, which removes the W7449 suppression; a test covers unavailable and recovery.

Part of home-assistant/epics#141.

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:
• Link to documentation pull request:
• Link to developer documentation pull request:
• Link to frontend pull request:

Checklist

• I understand the code I am submitting and can explain how it works.
• The code change is tested and works locally.
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• Tests have been added to verify that the new code works.
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  Updated by running python3 -m script.gen_requirements_all.
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