Update chao annotations

tip_annotations/chao.json

@@ -1638,5 +1638,18 @@
     "full_x": 590,
     "full_y": 264.5,
     "timestamp": "2026-04-04T02:34:17.751066"
+  },
+  "annotated_frame_938": {
+    "tip_x": 26,
+    "tip_y": 72.5,
+    "crop_x1": 564,
+    "crop_y1": 191,
+    "crop_w": 46,
+    "crop_h": 90,
+    "img_w": 640,
+    "img_h": 480,
+    "full_x": 590,
+    "full_y": 263.5,
+    "timestamp": "2026-04-04T02:34:20.439738"
   }
 }