Refactor Storage and Implement Routerv2 API

We are looking for an experienced backend developer to refactor our existing freeleaps-storage service, implement new API v2 routes with authentication, and develop a corresponding SDK (freeleaps-storage-sdk). We have a comprehensive design document ready. You must strictly follow the architectural guidelines and design logic provided in our documentation. Key Responsibilities & Deliverables： You will be responsible for the following tasks (detailed specifications are in our Gitea documentation): 1. Authentication & Integration: Integrate freeleaps-authentication and add API key authentication to the service. 2. Data Modeling: Create and update the required data models based on the new design. 3. API v2 Development: Implement 4 new v2 endpoints: Upload file；Get file metadata；Get file download link；Delete file 4. Quota Management: Add an endpoint to fetch product quotas and update used storage/usage status. 5: SDK Development: Build the freeleaps-storage-sdk from scratch, including: client、schemas、exception、examples、README This project is broken down into 3 milestones with strict deadlines: 1: Complete freeleaps_storage v2 APIs Deliverables: API key auth, data models, and the 4 core v2 endpoints + quota endpoints implemented. Deadline: July 7, 2026 Budget: $45 USD 2: New freeleaps_storage_sdk Deliverables: Completed SDK (client, schemas, exception, examples, and README). Deadline: July 8, 2026 Budget: $45 USD 3: Online Testing & Deployment Deliverables: Assist with online testing and ensure everything runs smoothly in production. Deadline: July 18, 2026 Budget: $10 USD