Define the generic provider/event/variable system:
- ServiceProvider ABC with connect, disconnect, poll, list_collections
- ServiceProviderType enum (IMMICH first)
- EventType enum (assets_added/removed, collection_renamed/deleted, sharing_changed)
- MediaAsset, MediaCollection, CollectionState dataclasses
- TemplateVariableDefinition and VariableRegistry with 11 base variables
- All models use extra: dict for provider-specific data passthrough
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
alexei.dolgolyov
3ed0d8ce88