added bank code and filename as composite key for ach_processed_files table

processors/file_processor.py

@@ -62,9 +62,9 @@ class FileProcessor:
         try:
             logger.info(f"Starting processing: {filename} (bank: {bankcode})")
 
-            # Step 1: Check if already processed
-            if self.repository.is_file_processed(filename):
-                logger.info(f"File already processed: {filename}")
+            # Step 1: Check if already processed for this bank
+            if self.repository.is_file_processed(filename, bankcode):
+                logger.info(f"File already processed for {bankcode}: {filename}")
                 return True
 
             # Step 2: Download file