chore: update dependency zod to v4

Author: renovate[bot]

package.json

@@ -45,7 +45,7 @@
     "typescript": "5.9.3",
     "vitest": "2.1.9",
     "yaml": "2.5.0",
-    "zod": "3.23.8"
+    "zod": "4.4.3"
   },
   "commitlint": {
     "extends": [