build(deps): bump zod from 3.25.76 to 4.3.6

Bumps [zod](https://github.com/colinhacks/zod) from 3.25.76 to 4.3.6.
- [Release notes](https://github.com/colinhacks/zod/releases)
- [Commits](colinhacks/zod@v3.25.76...v4.3.6)

---
updated-dependencies:
- dependency-name: zod
  dependency-version: 4.3.6
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

packages/mcp/package.json

@@ -28,7 +28,7 @@
     "@opencodehub/search": "workspace:*",
     "@opencodehub/storage": "workspace:*",
     "lru-cache": "11.2.2",
-    "zod": "3.25.76"
+    "zod": "4.3.6"
   },
   "devDependencies": {
     "@types/node": "20.14.0",

packages/sarif/package.json

@@ -25,7 +25,7 @@
   "dependencies": {
     "@types/sarif": "2.1.7",
     "yaml": "2.8.3",
-    "zod": "3.25.76"
+    "zod": "4.3.6"
   },
   "devDependencies": {
     "@types/node": "20.14.0",