Update chao annotations

chao.json

@@ -7990,5 +7990,18 @@
     "full_x": 286,
     "full_y": 229.5,
     "timestamp": "2026-04-12T20:08:39.390242"
+  },
+  "annotated_frame_y538": {
+    "tip_x": 70,
+    "tip_y": 44.5,
+    "crop_x1": 47,
+    "crop_y1": 294,
+    "crop_w": 88,
+    "crop_h": 70,
+    "img_w": 640,
+    "img_h": 480,
+    "full_x": 117,
+    "full_y": 338.5,
+    "timestamp": "2026-04-12T20:08:41.471272"
   }
 }