Update chao annotations

tip_annotations/chao.json

@@ -1201,5 +1201,18 @@
     "full_x": 500,
     "full_y": 195.5,
     "timestamp": "2026-04-04T02:32:12.049639"
+  },
+  "annotated_frame_306": {
+    "tip_x": 19,
+    "tip_y": 36.5,
+    "crop_x1": 480,
+    "crop_y1": 161,
+    "crop_w": 98,
+    "crop_h": 58,
+    "img_w": 640,
+    "img_h": 480,
+    "full_x": 499,
+    "full_y": 197.5,
+    "timestamp": "2026-04-04T02:32:15.367476"
   }
 }