remove MetaDataTable and MetaDataColumn to cleanup schema

kontor-scripts/import.py

@@ -3,6 +3,7 @@ import data from json file to PostgreSQL
 """
 from argparse import ArgumentParser, ArgumentDefaultsHelpFormatter
 
+from datetime import datetime
 from typing import Any, AnyStr, Dict, List
 import os
 import json
@@ -61,7 +62,14 @@ def get_ids(items: List[Any]) -> List[AnyStr]:
 def update_item(db: Session, import_data: Dict[AnyStr, Any], item: Any, dry_run: bool, log):
     for (key, value) in import_data.items():
         existing_value = getattr(item, str(key))
-        if existing_value != value:
+        update: bool = False
+        if isinstance(existing_value, datetime):
+            if str(existing_value) != str(value):
+                update = True
+        else:
+            if existing_value != value:
+                update = True
+        if update:
             if not dry_run:
                 log.debug(f"update {key}({existing_value}) with {value}")
                 setattr(item, str(key), value)