chore: align zod spec to ^3.25.76 (matches the pi stack #701)

Same resolved version; just the package.json floor, so #701 and #702 don't
conflict on the zod line.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: gewenyu99

package.json

@@ -54,7 +54,7 @@
     "xcode": "3.0.1",
     "xml-js": "^1.6.11",
     "yargs": "^16.2.0",
-    "zod": "^3.25.0",
+    "zod": "^3.25.76",
     "zod-to-json-schema": "^3.24.3"
   },
   "devDependencies": {