fix: deduplicate reconciliation loose items

app/reconciliation_service.py

@@ -2547,8 +2547,11 @@ def _record_reconciliation_decision(
         logger.warning("failed to record reconciliation decision %s: %s", decision_type, exc)
 
 
-def list_reconciliation_process_candidates(*, status: str = "open", days: int = 3, limit: int = 20) -> List[Dict[str, Any]]:
-    """Return grouped process candidates built from recent open items.
+def list_reconciliation_process_candidates(
+    *, status: str = "open", external_type: Optional[str] = None,
+    days: int = 3, limit: int = 20,
+) -> List[Dict[str, Any]]:
+    """Return process candidates built from items eligible in the active filter.
 
     A candidate is shown when at least two pieces of evidence share the same
     NIF/email/name, when one item already has a strong open-operation
@@ -2556,7 +2559,10 @@ def list_reconciliation_process_candidates(*, status: str = "open", days: int =
     (for example an Odoo sale order without ClientFlow).
     """
     try:
-        items = list_reconciliation_items(status=status, limit=300, days=days)
+        item_filters: Dict[str, Any] = {"status": status, "limit": 300, "days": days}
+        if external_type:
+            item_filters["external_type"] = external_type
+        items = list_reconciliation_items(**item_filters)
     except Exception as exc:  # pragma: no cover - production safety guard
         logger.warning("failed to list reconciliation items for process candidates: %s", exc)
         return []