feat: datetimes with timezones

repositories/project.py

@@ -1,4 +1,4 @@
-from datetime import datetime
+from datetime import datetime, timezone
 from typing import Optional
 
 from sqlalchemy import select
@@ -26,7 +26,7 @@ class ProjectRepository(BaseRepository):
 
     async def create(self, data: CreateProjectSchema) -> Project:
         project_data = data.model_dump()
-        project_data["created_at"] = datetime.now()
+        project_data["created_at"] = datetime.now(timezone.utc)
         project = Project(**project_data)
         self.session.add(project)
         await self.session.commit()