fix(parity): preserve legacy monthly turn ordering

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

@@ -1,4 +1,4 @@
-import { JosaUtil, LiteHashDRBG, RandUtil, asRecord } from '@sammo-ts/common';
+import { GAME_TICKS_PER_TURN, JosaUtil, LiteHashDRBG, RandUtil, asRecord } from '@sammo-ts/common';
 import { LogCategory, LogFormat, LogScope, type TurnCommandEnv } from '@sammo-ts/logic';
 import { simpleSerialize } from '@sammo-ts/logic/war/utils.js';
 
@@ -137,10 +137,12 @@ const buildNpc = (options: {
     }
     const turnSecond = rng.nextRangeInt(0, 60 * turnMinutes - 1);
     const turnFraction = rng.nextRangeInt(0, 999_999);
-    // core DB는 millisecond precision이므로 레거시 microsecond 값을 내림해
-    // 저장한다. 먼 과거 연도에서 IEEE-754 덧셈이 반올림하지 않도록 먼저
-    // 정수화한다.
-    const turnTime = new Date(environment.turnTime.getTime() + turnSecond * 1_000 + Math.floor(turnFraction / 1_000));
+    const ticksPerSecond = GAME_TICKS_PER_TURN / world.getState().tickSeconds;
+    const turnTick =
+        world.dateToGameTick(environment.turnTime) +
+        turnSecond * ticksPerSecond +
+        Math.floor((turnFraction * ticksPerSecond) / 1_000_000);
+    const turnTime = world.gameTickToDate(turnTick);
     const killturn = (deadYear - environment.year) * 12 + rng.nextRangeInt(0, 11) + environment.month - 1;
     const id = world.getNextGeneralId();
     const general: TurnGeneral = {
@@ -181,6 +183,7 @@ const buildNpc = (options: {
         },
         lastTurn: { command: '휴식' },
         turnTime,
+        turnTick,
         recentWarTime: null,
         meta: {
             killturn,