Business logic coordination between routes and services. Controllers should:

• Handle environment variables and configuration
• Coordinate multiple service calls
• Implement business rules and validation
• Handle service business logic layer (result.success)

• tasks.controller.ts - Handles PDF extraction, blob storage, and page duplication workflows for Notion webhooks
  • Page Duplication: Includes content filtering and H3-to-paragraph transformation for "Key findings" and "Notable disagreements"
• health.controller.ts - System health checks
• findings.controller.ts - Handles findings analysis workflow using ChatGPT and Notion integration
  • Question Tracking: Records "Total questions" count during initialization and "Completed questions" count upon finalization
  • Progress Monitoring: Enables completion rate analysis in Notion dashboards