Webhook handlers for Notion integrations.

• POST /tasks/blob - Process PDF extraction and blob storage for Notion pages
• POST /tasks/dupe - Duplicate Notion page to final reports database with content filtering
• POST /tasks/notion-webhook - General Notion webhook handler
• POST /tasks/test - Test endpoint for webhook authentication
• GET /tasks/debug-webhook - Debug endpoint to check webhook configuration

Routes handle HTTP request/response only. Business logic is delegated to:

• tasks.controller.ts - Orchestrates PDF extraction, blob storage, page duplication, and Notion updates
• notion.service.ts - Handles Notion API calls
• pdfExtractor.ts - Handles PDF text extraction

The /tasks/dupe endpoint duplicates a Notion page from any database to the final reports database (FINDINGS_REPORTS_FINAL_DB_ID) with content filtering:

• Removes: Callout blocks, code blocks, divider blocks, blocks containing "Evidence summary", blocks containing "Methodology", blocks containing "Executive summary"
• Preserves: All other content blocks in original order
• Source: Original page remains unchanged

Expects Notion webhook with page ID in data.id:

{
  "data": {
    "id": "page-id-here"
  }
}

{
  "success": true,
  "sourcePageId": "source-page-id",
  "targetPageId": "new-page-id", 
  "blocksCopied": 15,
  "blocksFiltered": 3,
  "timestamp": "2025-08-15T22:25:47.000Z"
}