fix: verify raw freshness by received time

go/vehicle-gateway/internal/history/query_test.go

@@ -370,3 +370,17 @@ func TestBuildRawFrameSQLUsesLiteralsForTDengine(t *testing.T) {
 		}
 	}
 }
+
+func TestBuildRawFrameSQLCanOrderByReceivedAt(t *testing.T) {
+	sqlText, args := buildRawFrameSQL("lingniu_vehicle_ts.raw_frames", RawFrameQuery{
+		Protocol: "JT808",
+		OrderBy:  "receivedAt",
+		Limit:    1,
+	})
+	if len(args) != 0 {
+		t.Fatalf("expected no query args for TDengine, got %#v", args)
+	}
+	if !strings.Contains(sqlText, "ORDER BY received_at DESC LIMIT 1 OFFSET 0") {
+		t.Fatalf("sql should order by received_at: %s", sqlText)
+	}
+}