feat: Update Extraction model and service to support deferred service detection

app/services/extraction_processor.py

@@ -1,7 +1,6 @@
 """Background extraction processor for handling extraction queue."""
 
 import asyncio
-from typing import Set
 
 from sqlmodel.ext.asyncio.session import AsyncSession
 
@@ -19,7 +18,7 @@ class ExtractionProcessor:
     def __init__(self) -> None:
         """Initialize the extraction processor."""
         self.max_concurrent = settings.EXTRACTION_MAX_CONCURRENT
-        self.running_extractions: Set[int] = set()
+        self.running_extractions: set[int] = set()
         self.processing_lock = asyncio.Lock()
         self.shutdown_event = asyncio.Event()
         self.processor_task: asyncio.Task | None = None
@@ -71,7 +70,7 @@ class ExtractionProcessor:
                 )
 
     async def _process_queue(self) -> None:
-        """Main processing loop that handles the extraction queue."""
+        """Process the extraction queue in the main processing loop."""
         logger.info("Starting extraction queue processor")
 
         while not self.shutdown_event.is_set():
@@ -161,7 +160,7 @@ class ExtractionProcessor:
             logger.exception("Error processing extraction %d: %s", extraction_id, e)
 
     def _on_extraction_completed(self, extraction_id: int, task: asyncio.Task) -> None:
-        """Callback when an extraction task is completed."""
+        """Handle completion of an extraction task."""
         # Remove from running set
         self.running_extractions.discard(extraction_id)