📦 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.

client/package.json

@@ -81,7 +81,7 @@
     "lodash": "^4.17.23",
     "lucide-react": "^0.394.0",
     "match-sorter": "^8.1.0",
-    "mermaid": "^11.13.0",
+    "mermaid": "^11.14.0",
     "micromark-extension-llm-math": "^3.1.0",
     "qrcode.react": "^4.2.0",
     "rc-input-number": "^7.4.2",