fix(deps): update dependency zod to v4

Author: renovate[bot]

package.json

@@ -51,7 +51,7 @@
     "minimatch": "10.0.3",
     "nodejs-file-downloader": "4.13.0",
     "posthog-node": "5.8.1",
-    "zod": "3.25.76"
+    "zod": "4.1.12"
   },
   "commitlint": {
     "extends": ["@commitlint/config-conventional"],