Jason Tudisco
7b54bbe892
Replace polling-based sync detection with SSE (Server-Sent Events) from CAN service for instant push notifications on new asset ingests. Add incremental hash queries via ?since=timestamp parameter to avoid transferring full hash lists on every sync cycle. CAN service changes: - Add broadcast channel (SyncEventSender) in AppState for SSE events - Add GET /sync/events SSE endpoint with auth via header or query param - Fire broadcast events on both ingest and sync push - Add db::get_assets_since() for incremental queries - Support ?since= parameter on POST /sync/hashes can-sync agent changes: - Add SSE subscription with auto-reconnect in can_client - Add get_hashes_since() for incremental catch-up - Rewrite live push loop: SSE-driven with 30s fallback poll - Remove poll_interval parameter from live sync functions All 6 stress tests pass (102 assets, 63 MB/s bidirectional). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>