fix(vm): correctly calculate tz

app/routes/vm.py

@@ -2,7 +2,7 @@ from fastapi import APIRouter, HTTPException
 from pydantic import BaseModel
 from database import insert_virtual_machine, fetch_all
 import requests
-from datetime import datetime
+from datetime import datetime, timezone
 
 router = APIRouter()
 
@@ -61,8 +61,9 @@ def import_hetzner_vms(token: HetznerToken):
             memory = f"{server['server_type']['memory']} GB"
             storage = f"{server['server_type']['disk']} GB"
             vm_type = server["server_type"]["name"]
-            created_at = datetime.fromisoformat(server["created"].rstrip("Z"))
-            time_on_duty = round((datetime.utcnow() - created_at).total_seconds() / 3600, 2)  # Convert to hours
+            created_at = datetime.fromisoformat(server["created"].rstrip("Z")).replace(tzinfo=timezone.utc)
+            now = datetime.now(timezone.utc)
+            time_on_duty = round((now - created_at).total_seconds() / 3600, 2)  # Convert to hours
 
             insert_virtual_machine(
                 name=name,