Update IPFS playlist CID in database during streaming for live HLS

- Add on_playlist_update callback to IPFSHLSOutput
- Pass callback through StreamInterpreter to output
- Update database with playlist CID as segments are created
- Enables live HLS redirect to IPFS before rendering completes

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tasks/streaming.py

@@ -332,6 +332,26 @@ def run_stream(
         interp.primitives.update(cid_prims)
         task_logger.warning(f"DEBUG: streaming:make-video-source is now: {type(interp.primitives.get('streaming:make-video-source'))}")
 
+        # Set up callback to update database when IPFS playlist is created (for live HLS redirect)
+        def on_playlist_update(playlist_cid):
+            global _resolve_loop, _db_initialized
+            import asyncio
+            import database
+            try:
+                if _resolve_loop is None or _resolve_loop.is_closed():
+                    _resolve_loop = asyncio.new_event_loop()
+                    asyncio.set_event_loop(_resolve_loop)
+                    _db_initialized = False
+                if not _db_initialized:
+                    _resolve_loop.run_until_complete(database.init_db())
+                    _db_initialized = True
+                _resolve_loop.run_until_complete(database.update_pending_run_playlist(run_id, playlist_cid))
+                logger.info(f"Updated pending run {run_id} with IPFS playlist: {playlist_cid}")
+            except Exception as e:
+                logger.error(f"Failed to update playlist CID in database: {e}")
+
+        interp.on_playlist_update = on_playlist_update
+
         # Run rendering to file
         logger.info(f"Rendering to {output_path}")
         interp.run(duration=duration, output=str(output_path))