some refactoring

src/models/comdirect.py

@@ -5,14 +5,14 @@ from pydantic import ConfigDict, Field, computed_field, field_validator
 from sqlalchemy import Date, String
 from sqlalchemy.orm import Mapped, mapped_column
 
-from src.models._common import (
+from src.models.common import (
     ExportBaseModel,
     IngestdbBase,
-    _hash,
     _parse_date_german,
     _parse_decimal_german,
     date2str,
     decimal2str,
+    hashify,
 )
 
 
@@ -72,7 +72,7 @@ class ComdirectGiro(ComdirectBase):
     @computed_field  # type: ignore[prop-decorator]
     @property
     def hash_id(self) -> str:
-        return _hash(self.date_val, self.date_book, self.text)
+        return hashify(self.date_val, self.date_book, self.text)
 
     @field_validator("date_book", mode="before")
     @classmethod