Add Roborock fan speed validation and error handling

[allenporter]

Proposed change

Add explicit validation on fan speed modes to limit to existing valid modes.

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:
• This PR is related to issue: Roborock Integration, mop_mode, fan_speed #166504
• 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.
• 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.
• Any generated code has been carefully reviewed for correctness and compliance with project standards.

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

• Documentation added/updated for www.home-assistant.io

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

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  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 diff between library versions and ideally a link to the changelog/release notes is added to the PR description.

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• I have reviewed two other open pull requests in this repository.

[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 improves the Roborock vacuum integration by validating requested fan speed values and raising a user-friendly ServiceValidationError (instead of propagating lower-level errors) when an invalid fan speed is provided.

Changes:

• Add explicit fan speed validation for the “V1” Roborock vacuum implementation by checking the fan speed against the device’s supported mapping.
• Add explicit fan speed validation/error translation for the Q7 implementation by converting ValueError into ServiceValidationError.
• Update/expand tests to verify invalid fan speed handling across multiple Roborock vacuum entity variants.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
homeassistant/components/roborock/vacuum.py	Adds fan speed validation and consistent ServiceValidationError handling for invalid values.
tests/components/roborock/test_vacuum.py	Adds a parameterized test ensuring invalid fan speeds raise ServiceValidationError for multiple entity types.

[edenhaus]

Thanks @allenporter 👍