fix(game): 국가 수 판정에서 합성 재야를 제외한다

Ref nation table에 없는 id=0 행이 정찰 차단과 월간 경매 난수 소비에 관여하지 않도록 모집단을 맞춘다. Ref의 maxnation 건국 표시 제한도 실행 제약을 늘리지 않고 명령표에 이관한다.

app/game-engine/src/turn/monthlyScoutBlockAction.ts

@@ -25,7 +25,10 @@ export const createScoutBlockHandler = (options: {
             // changing nation or game state. No provided scenario invokes it.
             throw new Error('update(): at least 3 arguments expected');
         }
-        for (const nation of world.listNations()) {
+        // Ref updates every row in its nation table. Core additionally keeps a
+        // synthetic id=0 neutral row, which is not a Ref nation row and must
+        // remain outside the last-nation scout policy.
+        for (const nation of world.listNations().filter((entry) => entry.id > 0)) {
             world.updateNation(nation.id, {
                 meta: {
                     ...nation.meta,

app/game-engine/src/turn/turnDaemon.ts

@@ -414,7 +414,8 @@ const createMonthlyCalendarRuntime = async (options: {
     clock: Clock;
 }) => {
     const cache: MonthlyRuntimeCache = {
-        nationPowerRollCount: options.snapshot.nations.length,
+        // Ref's monthly nation query has no Core-only id=0 neutral row.
+        nationPowerRollCount: options.snapshot.nations.filter((nation) => nation.id > 0).length,
         tournamentRollConsumed: false,
     };
     const unification = options.calendarHandlerOverride