feat: Jellyfin/Plex auto-import via watch queue

Webhook ingestion from media servers — movies land in a pending
watch queue, user rates and confirms to create diary entries.

- domain: WatchEvent, WebhookToken models, MediaServerParser port
- adapters: jellyfin + plex parser crates, SQLite + Postgres repos
- application: ingest/confirm/dismiss/cleanup use cases, token mgmt
- presentation: webhook endpoints (bearer + query param auth),
  watch queue + integrations settings HTML pages, OpenAPI docs
- worker: WatchEventCleanupJob (daily, 30d retention)

Movie resolution deferred to confirm — single canonical path
through log_review for enrichment, poster fetch, federation.

crates/application/src/tests/worker.rs

@@ -58,6 +58,7 @@ impl EventHandler for RecordingHandler {
             DomainEvent::FollowAccepted { .. } => "follow_accepted",
             DomainEvent::BackfillFollower { .. } => "backfill_follower",
             DomainEvent::FederationDeliveryRequested { .. } => "federation_delivery",
+            DomainEvent::WatchEventIngested { .. } => "watch_event_ingested",
         };
         self.calls.lock().unwrap().push(label);
         Ok(())