📦 chore: Bump mongodb-memory-server to v11.0.1, mermaid to v11.14.0, npm audit (#12543)

* 🔧 chore: Update `mongodb-memory-server` to v11.0.1

- Bump `mongodb-memory-server` version in `package-lock.json`, `api/package.json`, and `packages/data-schemas/package.json` from 10.1.4 to 11.0.1.
- Update related dependencies in `mongodb-memory-server` and `mongodb-memory-server-core` to ensure compatibility with the new version.
- Adjust `tslib` version in `mongodb-memory-server` to 2.8.1 and `debug` to 4.4.3 for consistency.

* chore: npm audit fix

* chore: Update `mermaid` dependency to version 11.14.0 in `package-lock.json` and `client/package.json`

* fix: use deterministic timestamps in convoStructure test

MongoDB 8.x (from mongodb-memory-server v11) no longer guarantees
insertion-order return for documents with identical timestamps.
Use sequential timestamps with overrideTimestamp to ensure buildTree
processes parents before children.

api/package.json

@@ -118,7 +118,7 @@
   },
   "devDependencies": {
     "jest": "^30.2.0",
-    "mongodb-memory-server": "^10.1.4",
+    "mongodb-memory-server": "^11.0.1",
     "nodemon": "^3.0.3",
     "supertest": "^7.1.0"
   }