feat: add notification retention scheduler

myteamwallet_backend/src/notifications/notification-retention.scheduler.ts

@@ -0,0 +1,41 @@
+import { Injectable } from '@nestjs/common';
+import { Cron, CronExpression } from '@nestjs/schedule';
+import { ConfigService } from '@nestjs/config';
+import { InjectRepository } from '@nestjs/typeorm';
+import { LessThan, Repository } from 'typeorm';
+import { LoggingService } from 'src/database/logging/logging.service';
+import { Notification } from './entities/notification.entity';
+
+@Injectable()
+export class NotificationRetentionScheduler {
+  constructor(
+    @InjectRepository(Notification)
+    private readonly repository: Repository<Notification>,
+    private readonly configService: ConfigService,
+    private readonly logger: LoggingService,
+  ) {}
+
+  @Cron(CronExpression.EVERY_DAY_AT_5AM)
+  async cleanupOldNotifications(): Promise<void> {
+    const retentionDays = this.configService.get<number>('app.logRetentionDays');
+    const cutoff = new Date();
+    cutoff.setUTCDate(cutoff.getUTCDate() - retentionDays);
+
+    try {
+      const result = await this.repository.delete({ createdAt: LessThan(cutoff) });
+
+      await this.logger.info({
+        event: 'notification_retention_cleanup_run',
+        details: `deletedCount=${result.affected ?? 0} retentionDays=${retentionDays}`,
+        userId: -1,
+      });
+    } catch (error) {
+      const errorMessage = error instanceof Error ? error.message : String(error);
+      await this.logger.error({
+        event: 'notification_retention_cleanup_run_fail',
+        details: errorMessage,
+        userId: -1,
+      });
+    }
+  }
+}