Refactor: Improve data fetching and handling for jump data and statistics.  Adds total count to API responses and handles potential null values.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 860dbf5f-8119-4dd1-a2c2-f72ccb064058
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/8d9dc7b0-1e2d-43c4-970a-c2420dc0d56c/1c8c4bc3-64ca-458a-a85c-ae9cd590cae7.jpg
