feat: add NotificationsService with SSE subject pool

apps/server/src/app.module.ts

@@ -1,6 +1,7 @@
 import { Module } from '@nestjs/common';
 import { APP_GUARD } from '@nestjs/core';
 import { ConfigModule, ConfigService } from '@nestjs/config';
+import { EventEmitterModule } from '@nestjs/event-emitter';
 import { TypeOrmModule } from '@nestjs/typeorm';
 import { ThrottlerModule, ThrottlerGuard } from '@nestjs/throttler';
 import {
@@ -28,7 +29,9 @@ import {
   DingAttendanceRaw,
   SyncLog,
   SyncState,
-} from './entities';
+  ExpenseType,
+  Notification,
+ } from './entities';
 import { AuthModule } from './auth/auth.module';
 import { RbacModule } from './rbac/rbac.module';
 import { StudentsModule } from './students/students.module';
@@ -48,6 +51,8 @@ import { AttendanceModule } from './attendance/attendance.module';
 import { SchedulesModule } from './schedules/schedules.module';
 import { ClassroomRentalsModule } from './classroom-rentals/classroom-rentals.module';
 import { SyncModule } from './sync/sync.module';
+import { NotificationsModule } from './notifications/notifications.module';
+import { ExpenseTypesModule } from './expense-types/expense-types.module';
 
 @Module({
   imports: [
@@ -58,6 +63,7 @@ import { SyncModule } from './sync/sync.module';
         limit: 100, // 普通接口每分钟100次
       },
     ]),
+    EventEmitterModule.forRoot(),
     TypeOrmModule.forRootAsync({
       imports: [ConfigModule],
       inject: [ConfigService],
@@ -88,7 +94,9 @@ import { SyncModule } from './sync/sync.module';
           DingAttendanceRaw,
           SyncLog,
           SyncState,
-        ];
+          ExpenseType,
+          Notification,
+         ];
         if (dbType === 'mysql') {
           return {
             type: 'mysql' as const,
@@ -127,6 +135,8 @@ import { SyncModule } from './sync/sync.module';
     SchedulesModule,
     ClassroomRentalsModule,
     SyncModule,
+    ExpenseTypesModule,
+    NotificationsModule,
   ],
   providers: [
     { provide: APP_GUARD, useClass: ThrottlerGuard },