comdirect ingest: overhaul

src/models/comdirect.py

@@ -1,10 +1,11 @@
 from datetime import date
 from decimal import Decimal
 
-from pydantic import BaseModel, Field, computed_field, field_validator
+from pydantic import Field, computed_field, field_validator
 from sqlalchemy import Column, Date, String
 
 from src.models._common import (
+    ExportBaseModel,
     IngestdbBase,
     _hash,
     _parse_date_german,
@@ -12,7 +13,7 @@ from src.models._common import (
 )
 
 
-class ComdirectBase(BaseModel):
+class ComdirectBase(ExportBaseModel):
     date_val: date | None = Field(
         alias="Wertstellung (Valuta)", examples=["07.09.2026"]
     )