getSnapshot

Best-available snapshot: seeds from the bundled asset if the cache is empty, then returns cached data. Never triggers a network call itself — freshness arrives via reconcile, which DeviceHardwareRepository triggers on the same cadence as its own catalog refresh. Callers must treat an absent/malformed entry for a given hwModel as a deliberate refusal, not a gap to fill with a guess — see applySoftDeviceVariant in DeviceHardwareRepositoryImpl.