test(compare): trace monthly diplomacy transitions

hwe/compare/monthly_event_trace.php

@@ -493,6 +493,7 @@ function comparisonMonthlyEventTraceMain(): void
                 'you' => $row['toNationId'],
                 'state' => $row['state'],
                 'term' => $row['term'],
+                'dead' => $row['dead'] ?? 0,
             ];
             DB::db()->insertUpdate('diplomacy', $diplomacyPatch, $diplomacyPatch);
         }