security: fix uuid vulnerability in contracts via npm overrides

- Add npm overrides to force uuid to ^14.0.0 (patched version)
- Fixes medium severity uuid vulnerability (GHSA-mpjj-7v5q-gv8h)

Note: 37 remaining vulnerabilities in contracts are related to hardhat
ecosystem dependencies (elliptic, undici, serialize-javascript, tmp) and
require major version upgrades that could break smart contract tests.
These should be addressed in a separate upgrade effort.

contracts/package.json

@@ -21,5 +21,8 @@
     "ts-node": "^10.9.2",
     "typechain": "^8.3.2",
     "typescript": "^6.0.3"
+  },
+  "overrides": {
+    "uuid": "^14.0.0"
   }
 }