Update config_models.py

config_models.py

@@ -6,12 +6,21 @@ from datetime import datetime
 from pydantic import BaseModel, Field
 
 class BaseModelWithDatetime(BaseModel):
-    """Base model with datetime serialization support"""
-    class Config:
-        json_encoders = {
-            datetime: lambda v: v.isoformat() if v else None
-        }
-
+    """Base model with consistent datetime serialization"""
+    
+    @field_serializer('created_date', 'last_update_date', 'publish_date', 'timestamp')
+    def serialize_datetime(self, dt: Optional[datetime], _info) -> Optional[str]:
+        """Serialize datetime fields to consistent ISO format"""
+        if dt is None:
+            return None
+        if isinstance(dt, str):
+            # String ise normalize et
+            return dt.replace(' ', 'T')
+        if isinstance(dt, datetime):
+            # Datetime objesi ise ISO formatına çevir
+            return dt.isoformat()
+        return str(dt)
+        
 # ===================== User & Auth =====================
 class UserConfig(BaseModelWithDatetime):
     username: str