Restore mopeka sensor entity data across reloads

[bdraco]

Breaking change

Proposed change

The mopeka integration registers a passive bluetooth processor without an entity description class, so entity_data is not persisted across integration reloads or Home Assistant restarts; entities go blank until the next advertisement carries data. Passing SensorEntityDescription to async_register_processor opts into the existing restore path in passive_update_processor so last known values reappear immediately on startup and update normally as fresh advertisements arrive.

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

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• This PR fixes or closes issue: fixes #
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[Copilot]

Pull request overview

This PR updates the Mopeka BLE sensor platform to opt into the passive Bluetooth restore mechanism so last-known sensor values persist across integration reloads and Home Assistant restarts.

Changes:

• Register the Mopeka PassiveBluetoothDataProcessor with SensorEntityDescription so PassiveBluetoothProcessorCoordinator can restore entity_data/entity_descriptions on startup/reload.

[bdraco]

thanks