fix: comprehensive fixes for ingestion and TKG

1. Add Redis PipelineProgress cleanup in unregister_internal
   - Deletes progress key when file is unregistered

2. Fix ingestion_complete asr_status query
   - Query ASRX first, then ASR
   - Filter out NULL values to avoid false negatives

3. Fix TKG 0 nodes/edges support
   - TKG is considered done if face traces are complete
   - TKG may create 0 nodes/edges for videos with minimal content

4. Add ASRX fallback to ASR segments
   - When ASRX has 0 segments but ASR has segments, use ASR segments
   - Ensures at least one ASRX output when ASR has content

scripts/asrx_processor.py

@@ -160,6 +160,41 @@ def _convert_result(result, output_path):
             pass
 
     segment_count = len(result.get("segments", []))
+    
+    # Fallback: if ASRX has 0 segments but ASR has segments, use ASR segments
+    if segment_count == 0:
+        asr_path = output_path.replace(".asrx.json", ".asr.json")
+        if os.path.exists(asr_path):
+            try:
+                with open(asr_path) as f:
+                    asr_data = json.load(f)
+                asr_segments = asr_data.get("segments", [])
+                if asr_segments:
+                    print(f"[ASRX] ASRX has 0 segments, falling back to {len(asr_segments)} ASR segments", file=sys.stderr)
+                    # Convert ASR segments to ASRX format
+                    converted_segments = []
+                    for seg in asr_segments:
+                        start_time = seg.get("start_time", seg.get("start", 0))
+                        end_time = seg.get("end_time", seg.get("end", 0))
+                        start_frame = int(start_time * fps)
+                        end_frame = int(end_time * fps)
+                        converted_segments.append({
+                            "start_time": start_time,
+                            "end_time": end_time,
+                            "start_frame": start_frame,
+                            "end_frame": end_frame,
+                            "text": seg.get("text", ""),
+                            "speaker_id": "SPEAKER_0",
+                            "language": "",
+                            "lang_prob": 0.0,
+                            "quality": 0.0,
+                        })
+                    result["segments"] = converted_segments
+                    segment_count = len(converted_segments)
+                    result["status"] = "has_transcript"
+            except Exception as e:
+                print(f"[ASRX] Failed to load ASR fallback: {e}", file=sys.stderr)
+
     if segment_count > 0:
         status = "has_transcript"
     else: