Implement semi-annual monthly processing

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

@@ -48,6 +48,7 @@ import {
 import { createRaiseDisasterHandler } from './monthlyDisasterAction.js';
 import { createUpdateCitySupplyHandler } from './monthlyCitySupplyAction.js';
 import { createUpdateNationLevelHandler } from './monthlyNationLevelAction.js';
+import { createProcessSemiAnnualHandler } from './monthlySemiAnnualAction.js';
 import { DatabaseTurnDaemonLease, TurnDaemonLeaseUnavailableError } from '../lifecycle/databaseTurnDaemonLease.js';
 
 export interface TurnDaemonRuntimeOptions {
@@ -201,6 +202,13 @@ const createTurnDaemonRuntimeWithLease = async (
             map: snapshot.map,
         })
     );
+    eventActions.set(
+        'ProcessSemiAnnual',
+        createProcessSemiAnnualHandler({
+            getWorld: () => worldRef,
+            nationTraits: nationTraitMap,
+        })
+    );
     if (reservedTurnStoreHandle) {
         eventActions.set(
             'UpdateNationLevel',