Fix HLS validation for multi-resolution output

MultiResolutionHLSOutput creates files in subdirectories:
- original/playlist.m3u8 instead of stream.m3u8
- original/segment_*.ts instead of segment_*.ts

The validation now checks both paths.

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

tasks/streaming.py

@@ -411,14 +411,22 @@ def run_stream(
                     logger.error(f"Failed to update pending run with playlist CID: {e}")
                     raise  # Fail fast - database errors should not be silently ignored
 
-        # HLS output creates stream.m3u8 and segment_*.ts files in stream_dir
+        # HLS output creates playlist and segments
+        # - Single-res: stream_dir/stream.m3u8 and stream_dir/segment_*.ts
+        # - Multi-res: stream_dir/original/playlist.m3u8 and stream_dir/original/segment_*.ts
         hls_playlist = stream_dir / "stream.m3u8"
+        if not hls_playlist.exists():
+            # Try multi-res output path
+            hls_playlist = stream_dir / "original" / "playlist.m3u8"
 
         # Validate HLS output (must have playlist and at least one segment)
         if not hls_playlist.exists():
             raise RuntimeError("HLS playlist not created - rendering likely failed")
 
         segments = list(stream_dir.glob("segment_*.ts"))
+        if not segments:
+            # Try multi-res output path
+            segments = list(stream_dir.glob("original/segment_*.ts"))
         if not segments:
             raise RuntimeError("No HLS segments created - rendering likely failed")