marketplace refactoring

models/database/base.py

@@ -1,4 +1,4 @@
-from datetime import datetime
+from datetime import datetime, timezone
 
 from sqlalchemy import Column, DateTime
 
@@ -8,7 +8,7 @@ from app.core.database import Base
 class TimestampMixin:
     """Mixin to add created_at and updated_at timestamps to models"""
 
-    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)
+    created_at = Column(DateTime, default=datetime.now(timezone.utc), nullable=False)
     updated_at = Column(
-        DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, nullable=False
+        DateTime, default=datetime.now(timezone.utc), onupdate=datetime.now(timezone.utc), nullable=False
     )