feat: Docker Compose deployment + auto migration on startup

- docker-compose.yml: 移除 MySQL 容器，连宿主机 MySQL
- main.ts: 启动前通过独立 DataSource 执行 runMigrations
- migration-runner.ts: 独立 migration 执行器
- app.module.ts: TypeORM 配置增加 migrations
- 修复 InitialSchema 中 room_expenses 和 financial_operations 重复索引

apps/server/src/app.module.ts

@@ -50,6 +50,8 @@ import {
   FinancialOperation,
 } from './entities';
 import { AuthModule } from './auth/auth.module';
+import { InitialSchema1784520727860 } from './migrations/1784520727860-InitialSchema';
+const allMigrations = [InitialSchema1784520727860];
 import { AuthorizationModule } from './authorization';
 import { RbacModule } from './rbac/rbac.module';
 import { StudentsModule } from './students/students.module';
@@ -158,6 +160,7 @@ import { IntegrationConfigModule } from './integration/config/config.module';
             password: config.get<string>('DB_PASSWORD', ''),
             database: config.get<string>('DB_DATABASE', 'dorm_billing'),
             entities: allEntities,
+            migrations: allMigrations,
             synchronize: config.get('DB_SYNCHRONIZE', 'true') !== 'false',
             charset: 'utf8mb4',
           };
@@ -165,6 +168,7 @@ import { IntegrationConfigModule } from './integration/config/config.module';
         return {
           type: 'better-sqlite3' as const,
           database: config.get<string>('DB_DATABASE', 'dorm_billing.db'),
+          migrations: allMigrations,
           entities: allEntities,
           synchronize: config.get('DB_SYNCHRONIZE', 'true') !== 'false',
         };