Bump python-roborock to 3.9.2

[allenporter]

This includes a breaking change to the caching API that requires blowing away storage. We don't bother testing the migration since it was only used during beta. This was manually tested that it fixes the existing cache format issue.

Proposed change

Bump python-roborock to 3.9.1
Release notes: https://github.com/Python-roborock/python-roborock/releases/tag/v3.9.2
Changes: Python-roborock/python-roborock@v3.8.4...v3.9.2

This fixes a serialization issue and removes the old cache, which is done as a breaking change to simplify upgrade. This is manually tested, and removes the old cache that was only alive during beta. This is not unit tested since it was only alive in beta.

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 Roborock is not available after update to core-2025.12.0b3 #157663
• This PR is related to issue:
• Link to documentation pull request:
• Link to developer documentation pull request:
• Link to frontend pull request:

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[home-assistant]

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

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[Copilot]

Pull request overview

This PR bumps the python-roborock dependency from version 3.8.4 to 3.9.1 to fix a cache serialization issue. The library's breaking change in the caching API requires migrating to a new cache format (version 2), which is handled by wiping the old cache data that was only used during the integration's beta period.

Key changes:

• Updated dependency version in manifest and requirements files
• Implemented cache migration from version 1 to 2 by returning empty cache data
• Replaced deprecated dataclasses.asdict() with CacheData.as_dict() and CacheData(**dict) with CacheData.from_dict()

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
homeassistant/components/roborock/manifest.json	Updates python-roborock requirement to 3.9.1
requirements_all.txt	Updates python-roborock dependency to 3.9.1
requirements_test_all.txt	Updates python-roborock test dependency to 3.9.1
homeassistant/components/roborock/roborock_storage.py	Implements cache migration logic, updates to new library API (from_dict/as_dict), removes unused dataclasses import, and bumps cache version to 2

[edenhaus]

Thanks @allenporter 👍