Newsence Core Worker

Endpoints:
GET  /health
*    /preview                    - Scrape-only: {"url":"..."} or {"message":"..."}
POST /submit                     - Submit URL: {"url": "..."}
GET  /status/:instanceId         - Workflow status (JSON)
GET  /stream/:instanceId         - Workflow status (SSE)
POST /telegram/lookup            - Lookup Telegram account binding
POST /telegram/collections       - Fetch user collections
POST /telegram/add-to-collection - Add article to collection