Create Session From Extraction

Create an enrichment session from a saved extraction.

This endpoint converts an extraction (stored as JSON in Supabase storage) into a new enrichment session with associated dataset and dataset_rows.

Flow:

1. Fetch user_extractions record (validate ownership)
2. Download JSON from extraction-files bucket using storage_path
3. Parse JSON array of lead objects
4. Create processing_sessions record (pipeline_type=“enrichment”)
5. Create datasets record (source_type=“extraction”)
6. Create dataset_rows records (one per lead)
7. Update user_extractions.session_id to link them
8. Return session details

Args: extraction_id: The ID of the extraction to convert current_user: Authenticated user information cache: Redis cache instance settings: Application settings

Returns: CreateSessionResponse with session_id and metadata

Raises: HTTPException: If extraction not found, access denied, or processing fails