fix: skip empty ASRX segments in Rule 1, fix chunk_id numbering

- Skip chunks where both ASRX text and OCR text are empty
- Use count-based chunk_id instead of index to avoid gaps
- This ensures PostgreSQL and Qdrant chunk counts match

src/core/chunk/rule1_ingest.rs

@@ -38,6 +38,11 @@ pub async fn execute_rule1(db: &PostgresDb, file_uuid: &str, fps: f64) -> Result
             format!("{} {}", seg.text, ocr_text)
         };
 
+        // Skip chunks with no text (empty ASRX and no OCR)
+        if combined_text.trim().is_empty() {
+            continue;
+        }
+
         let metadata = serde_json::json!({
             "language": seg.language,
         });
@@ -50,7 +55,7 @@ pub async fn execute_rule1(db: &PostgresDb, file_uuid: &str, fps: f64) -> Result
         let chunk = Chunk::from_seconds(
             file_id as i32,
             file_uuid.to_string(),
-            format!("{}", idx),
+            format!("{}", count),
             ChunkType::Sentence,
             ChunkRule::Rule1,
             seg.start_time,