Quiva Hub Marketplace

Manages marketplace listings, submissions, and product operations for the Quiva Hub platform. Enables users to discover, download, rate, and publish marketplace products including workflows, agents, and MCPs.

Includes:

1. GET /hub/marketplace/workflows
2. GET /hub/marketplace/submissions
3. POST /hub/marketplace/submissions
4. GET /hub/marketplace/submissions/{topic}
5. PATCH /hub/marketplace/submissions/{topic}
6. DELETE /hub/marketplace/submissions/{topic}
7. POST /hub/marketplace/workflows/buy
8. POST /hub/marketplace/workflows/download
9. GET /hub/marketplace/download-stats
10. GET /hub/marketplace/product
11. POST /hub/marketplace/rate-product