feat: wire v3 dossier API and reconciliation

site/services/extractor.py

@@ -306,10 +306,22 @@ def extract_document(document, llm_client=None, batch_id=None):
         return {"ok": False, "document_id": document_id, "error": str(error)}
 
 
-def extract_batch(batch_id, llm_client=None):
-    """Обработать все документы batch и вернуть сводку без batch-wide failure."""
+def extract_batch(batch_id, llm_client=None, progress_callback=None):
+    """Обработать документы batch и вернуть сводку без batch-wide failure.
+
+    Optional progress callback получает (completed_count, document_result) после
+    каждого документа; ошибки callback не должны останавливать обработку batch.
+    """
     documents = db_docs.list_for_extraction(batch_id)
-    results = [extract_document(document, llm_client=llm_client, batch_id=batch_id) for document in documents]
+    results = []
+    for completed, document in enumerate(documents, start=1):
+        result = extract_document(document, llm_client=llm_client, batch_id=batch_id)
+        results.append(result)
+        if progress_callback is not None:
+            try:
+                progress_callback(completed, result)
+            except Exception:
+                log.exception("Extraction progress callback failed for batch %s", batch_id)
     done = sum(1 for result in results if result["ok"])
     failed = len(results) - done
     classes = {}