test(server/m7-recurring-scans): TZ-tolerant next-fire assertion

The PATCH-daily test parsed the wire RFC3339 timestamp and asserted
.UTC().Hour() == 3, but the handler computes NextFire against
time.Now() in the host zone before serializing as UTC — so non-UTC
runners would see a non-3 UTC hour. Switch the assertion to
.Local().Hour() to match the handler's computation regardless of
the runner's TZ.

internal/api/admin_scan_schedule_test.go

@@ -91,8 +91,12 @@ func TestAdminScanSchedule_Patch_DailyMode(t *testing.T) {
 		next, err := time.Parse(time.RFC3339, *resp.NextScheduledAt)
 		if err != nil {
 			t.Errorf("NextScheduledAt parse: %v", err)
-		} else if next.UTC().Hour() != 3 || next.UTC().Minute() != 0 {
-			t.Errorf("NextScheduledAt time = %v, want 03:00 UTC in some day", next)
+		} else if local := next.Local(); local.Hour() != 3 || local.Minute() != 0 {
+			// Handler computes next-fire from time.Now() in the host zone, so
+			// the local-time hour is what's stable across CI runners regardless
+			// of TZ; the wire timestamp is UTC but parses back to the same
+			// instant either way.
+			t.Errorf("NextScheduledAt local time = %v, want 03:00 in host zone", local)
 		}
 	}
 }