fix: worker/processor.rs ASRX 使用正確的 start_frame

- 使用 segment.start_frame 取代 i (sequential index)
- data JSON 加入 start_frame, end_frame

src/worker/processor.rs

@@ -1501,10 +1501,11 @@ impl ProcessorPool {
                 "speaker_id": segment.speaker_id,
                 "timestamp": segment.start_time,
                 "end_time": segment.end_time,
+                "start_frame": segment.start_frame,
+                "end_frame": segment.end_frame,
             });
 
-            // ASRX is time-based, so we use segment index or start time as coordinate.
-            pre_chunks_to_store.push((i as i64, Some(segment.start_time), data, None, None));
+            pre_chunks_to_store.push((segment.start_frame as i64, Some(segment.start_time), data, None, None));
 
             speaker_detections.push((
                 segment.speaker_id.clone().unwrap_or_default(),