feat: initialize hechos_finance list in data processing pipeline

app.py

@@ -542,6 +542,7 @@ def procesar_lote_tabular(payloads: List[ProcessSheetPayload], db: Session = Dep
         hechos_surveys = []
         hechos_academic = []
         hechos_budget = []
+        hechos_finance = []
 
         for payload in payloads:
             # Dimensiones requeridas