refactor: move api scraping logic to shared

[aturret]

Summary by CodeRabbit

• Refactor

  • Moved scraper logic into a shared package and consolidated related services (including Telegraph) for reuse.
  • Added an optional "scrapers" dependency group to centralize third-party scraper libraries.
  • Simplified API-layer scrapers to rely on shared implementations.

• Documentation

  • Removed legacy top-level app re-export docs and updated architecture README to match the new structure.