Update clean.py

clean.py

@@ -98,6 +98,9 @@ def main():
         columns=["filename", "video_id", "video_path", "label", "start", "end"],
     )
 
+    cleaned["start"] = cleaned["start"].astype("Int64")
+    cleaned["end"] = cleaned["end"].astype("Int64")
+    
     cleaned.to_csv(OUTPUT_CSV, index=False)
     print(f"✅ Wrote {len(cleaned)} rows -> {OUTPUT_CSV}")