feat: add Qdrant vector database client

[moluscorichman-oss]

Adds REST-only Qdrant vector database support to the JavaScript SDK.

/claim #273

What changed

• Added Qdrant client under src/vector-db/src/lib/qdrant/qdrant.ts
• Exported the client from src/vector-db/src/index.ts
• Added focused tests for collection creation, upsert, and search request behavior

Notes

• Uses Qdrant REST API directly; no Qdrant SDK/package dependency added
• Supports URL/API key constructor args and QDRANT_URL / QDRANT_API_URL / QDRANT_API_KEY env vars
• Includes retry behavior consistent with the existing Supabase vector DB wrapper style

Verification

From JS/edgechains/arakoodev:

npm install --package-lock=false --ignore-scripts
npm run build
npm test -- --run src/vector-db/src/tests/qdrant/qdrant.test.ts

Results:

• npm run build passed
• targeted Vitest suite passed: 2 tests / 1 file

I have read the Arakoo CLA Document and I hereby sign the CLA.

[github-actions]

CLA Assistant Lite bot All contributors have signed the CLA ✍️ ✅

[moluscorichman-oss]

I have read the Arakoo CLA Document and I hereby sign the CLA

[moluscorichman-oss]

recheck