Update chao annotations

chao.json

@@ -7557,5 +7557,18 @@
     "full_x": 341.5,
     "full_y": 325.5,
     "timestamp": "2026-04-12T20:06:55.029370"
+  },
+  "annotated_frame_fancap_87": {
+    "tip_x": 12,
+    "tip_y": 35.5,
+    "crop_x1": 274,
+    "crop_y1": 216,
+    "crop_w": 46,
+    "crop_h": 50,
+    "img_w": 640,
+    "img_h": 480,
+    "full_x": 286,
+    "full_y": 251.5,
+    "timestamp": "2026-04-12T20:06:57.632025"
   }
 }