- Add legacyCode to ROOM_LOCATIONS constants (102-200)
- Add getLocationLegacyCode() to convert ID -> code when saving
- Add getLocationIdFromCode() to convert code -> ID when loading
- updateDeviceMetadata now sends numeric codes to Legacy API
- getDevicesForBeneficiary now converts codes back to string IDs
Legacy API expects numeric location codes (e.g., 102 for Bedroom),
but frontend uses string IDs (e.g., 'bedroom'). This fix ensures
proper bidirectional conversion.
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Co-Authored-By: Claude <noreply@anthropic.com>
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