feat: add Qdrant vector database support to JavaScript SDK

[modelsbridgeaicom-ship-it]

Implements Qdrant vector database support for the JavaScript SDK without adding a Qdrant package dependency.

What changed:

• Added a Qdrant wrapper under vector-db.
• Calls Qdrant REST API directly with fetch.
• Supports collection creation, point upsert, vector search, point retrieval, scrolling, payload updates, payload clearing, and point deletion.
• Uses QDRANT_URL and optional QDRANT_API_KEY from constructor args or environment.
• Exports Qdrant from @arakoodev/edgechains.js/vector-db.
• Added tests for create collection, upsert, and search request shape.

Verification:

• npx.cmd tsc -b
• npx.cmd jest src/vector-db/src/tests/qdrant/qdrant.test.ts --runInBand

Notes:

• No @qdrant/* package was added.
• Matches the existing SDK style by using a class wrapper and retry behavior.

Closes #273
/claim #273

[github-actions]

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[modelsbridgeaicom-ship-it]

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

[modelsbridgeaicom-ship-it]

recheck

[modelsbridgeaicom-ship-it]

Demo video: https://github.com/modelsbridgeaicom-ship-it/EdgeChains/releases/download/qdrant-demo-pr-597/EdgeChains-qdrant-demo.mp4

Additional verification is green on this PR:

• changes: pass
• js: pass
• CLAAssistant: pass

Local verification before opening the PR:

• npx.cmd tsc -b
• npx.cmd jest src/vector-db/src/tests/qdrant/qdrant.test.ts --runInBand

[modelsbridgeaicom-ship-it]

Maintainer review follow-up for #273:

This PR is still open and green from the visible signals:

• changes: pass
• js: pass
• CLAAssistant: pass
• demo video is posted in the thread
• implementation keeps the Qdrant integration dependency-free and uses REST calls directly, matching the issue constraint

I can adjust the wrapper shape, method coverage, or tests if you want this narrowed before merge/reward review.