Merge pull request 'fix(extraction): self-heal לתור חילוץ-ההלכות + drainer מתוזמן' (#142) from worktree-halacha-selfheal into main

mcp-server/src/legal_mcp/services/db.py

@@ -5440,6 +5440,34 @@ async def list_pending_extraction_requests(
     return out
 
 
+async def requeue_stale_processing_extractions(kind: str = "halacha") -> int:
+    """Re-stamp orphaned 'processing' rows so they re-drain. Returns count healed.
+
+    A drain that died mid-extraction can leave a row ``status='processing'`` with
+    its ``requested_at`` already cleared — orphaned: the queue selects on
+    ``requested_at IS NOT NULL`` so it would never be picked again. We re-stamp
+    those (only when requested_at IS NULL, i.e. not an actively-processing row in
+    a concurrent run) so the next drain resumes them.
+    """
+    status_col = (
+        "metadata_extraction_status" if kind == "metadata"
+        else "halacha_extraction_status"
+    )
+    req_col = (
+        "metadata_extraction_requested_at" if kind == "metadata"
+        else "halacha_extraction_requested_at"
+    )
+    pool = await get_pool()
+    tag = await pool.execute(
+        f"UPDATE case_law SET {req_col} = now(), {status_col} = 'pending' "
+        f"WHERE {status_col} = 'processing' AND {req_col} IS NULL"
+    )
+    try:
+        return int(str(tag).split()[-1])
+    except (ValueError, IndexError):
+        return 0
+
+
 async def extraction_queue_status() -> dict:
     """Pending-extraction queue depth per kind (INV-TOOL4 visibility / GAP-45).