Fix common statement reconciliation and analyzer filenames

app/modules/bank_statement_analyzer/parsers/base.py

@@ -8,6 +8,7 @@ import pdfplumber
 
 @dataclass
 class StatementMeta:
+    statement_id: str = ""
     bank_name: str = ""
     customer_name: str = ""
     account_number: str = ""
@@ -27,7 +28,7 @@ class StatementMeta:
         return asdict(self)
 
 STANDARD_COLUMNS = [
-    "transaction_date", "value_date", "narration", "reference_no",
+    "statement_id", "transaction_date", "value_date", "narration", "reference_no",
     "debit", "credit", "balance", "bank_name", "customer_name",
     "account_number", "source_file", "source_page", "parser_name",
     # Internal extraction-audit fields. These are retained for diagnostics but