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ed9444cf3d
Adds a per-user SSE pipe (GET /api/events) plus a per-message chat-stream reconnect endpoint (GET /api/messages/<id>/events). Backend substrate: - application/events/ — durable journal (Redis Streams) + live pub/sub for user-scoped events, with publish_user_event() as the worker-side entrypoint. - application/streaming/ — broadcast_channel for pub/sub fanout and event_replay for the per-message snapshot+tail path. - application/storage/db/repositories/message_events.py + alembic 0007 — Postgres journal for chat-stream events. - application/worker.py — ingest/reingest/remote/connector/ attachment/mcp_oauth tasks publish queued/progress/completed/ failed envelopes alongside their existing status updates. Frontend client: - frontend/src/events/ — connect/reconnect, Last-Event-ID cursor, backoff with jitter. Each tab runs its own connection; no cross-tab dedup (future work). - frontend/src/notifications/ — recentEvents ring, cursor tracking, tool-approval toast. - frontend/src/upload/uploadSlice.ts — extraReducers for source.ingest.* and attachment.* events. Coverage: 132 SSE tests across events substrate, replay, journal, routes, and worker publishes.