Update chao annotations

chao.json

@@ -8231,5 +8231,18 @@
     "full_x": 282.5,
     "full_y": 211.5,
     "timestamp": "2026-04-12T20:09:46.566207"
+  },
+  "annotated_frame_y688": {
+    "tip_x": 14,
+    "tip_y": 87.5,
+    "crop_x1": 298,
+    "crop_y1": 127,
+    "crop_w": 56,
+    "crop_h": 120,
+    "img_w": 640,
+    "img_h": 480,
+    "full_x": 312,
+    "full_y": 214.5,
+    "timestamp": "2026-04-12T20:09:50.451805"
   }
 }