Sync completed work orders into vehicle records

tests/test_platform.py

@@ -73,6 +73,16 @@ async def test_service_visit_owner_confirmation_and_change_request(
     assert complete_response.json()["status"] == "pending_owner_confirmation"
     assert confirm_response.json()["status"] == "confirmed"
     assert approve_response.json()["status"] == "approved"
+    refreshed = await client.get(f"/api/cars/{vehicle['id']}", headers=auth_headers)
+    services = await client.get(f"/api/cars/{vehicle['id']}/service", headers=auth_headers)
+    stats = await client.get(
+        f"/api/cars/{vehicle['id']}/stats?date_from=2026-05-01&date_to=2026-05-31",
+        headers=auth_headers,
+    )
+    assert refreshed.json()["current_odometer"] == 12345
+    assert services.json()[0]["total_cost"] == "100.00"
+    assert stats.json()["service_cost"] == "100.00"
+    assert stats.json()["total_cost"] == "100.00"
 
 
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