fix: repair existing test failures

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

@@ -301,6 +301,7 @@ const zNpcPossessGeneral = z
         ownerLegacyPenalty: zRecord.optional(),
         generalId: z.number().int().positive(),
         tokenNonce: z.number().int().nonnegative(),
+        acceptedGameAt: z.string().refine(isCanonicalIsoTimestamp).optional(),
     })
     .strict();
 

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

@@ -460,6 +460,7 @@ export const possessNpcGeneral = async (options: {
     acceptedAt: Date;
 }): Promise<{ ok: true; generalId: number }> => {
     const { db, world, worldState, userId, generalId, acceptedAt } = options;
+    // queue 대기 중 만료된 token도 enqueue 시점에는 유효했으므로 저장된 논리 수락 시각으로 다시 검증한다.
     const tokenAcceptedAt = truncateToSeconds(acceptedAt);
     requireNpcPossessionWorld(worldState);
     await lockNpcPossession(db, userId);

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

@@ -294,7 +294,9 @@ async function handleNpcPossessGeneral(
         throw new Error('NPC possession world state is missing.');
     }
     const operationalAcceptedAt = await resolveCommandAcceptedAt(db, command);
-    const acceptedAt = ctx.world.getGameNow(operationalAcceptedAt);
+    const acceptedAt = command.acceptedGameAt
+        ? new Date(command.acceptedGameAt)
+        : ctx.world.getGameNow(operationalAcceptedAt);
     try {
         return {
             type: 'npcPossessGeneral',