feat: Add cron job for audit logs cleanup

- Add cleanupAuditLogs.js with daily cleanup job
- Delete audit logs older than 7 days
- Runs every day at midnight (00:00)
- Export cleanupOldAuditLogs for manual triggers

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/cron/cleanupAuditLogs.js

@@ -0,0 +1,57 @@
+import cron from 'node-cron';
+import { db } from '../config/database.js';
+import { auditLogs } from '../db/schema.js';
+import { lt, sql } from 'drizzle-orm';
+import { logger } from '../utils/logger.js';
+
+const RETENTION_DAYS = 7;
+
+/**
+ * Delete audit logs older than RETENTION_DAYS
+ */
+export const cleanupOldAuditLogs = async () => {
+  const cutoffDate = new Date();
+  cutoffDate.setDate(cutoffDate.getDate() - RETENTION_DAYS);
+
+  logger.info(`[Audit Cleanup] Spúšťam čistenie audit logov starších ako ${RETENTION_DAYS} dní (pred ${cutoffDate.toISOString()})`);
+
+  try {
+    const result = await db
+      .delete(auditLogs)
+      .where(lt(auditLogs.createdAt, cutoffDate))
+      .returning({ id: auditLogs.id });
+
+    const deletedCount = result.length;
+
+    if (deletedCount > 0) {
+      logger.info(`[Audit Cleanup] Úspešne zmazaných ${deletedCount} starých audit logov`);
+    } else {
+      logger.info('[Audit Cleanup] Žiadne staré audit logy na zmazanie');
+    }
+
+    return deletedCount;
+  } catch (error) {
+    logger.error('[Audit Cleanup] Chyba pri mazaní audit logov:', error);
+    throw error;
+  }
+};
+
+/**
+ * Start the audit logs cleanup cron job
+ * Runs every day at midnight (00:00)
+ */
+export const startAuditCleanupCron = () => {
+  // Schedule: '0 0 * * *' = every day at 00:00
+  cron.schedule('0 0 * * *', () => {
+    logger.info('[Audit Cleanup] Cron job spustený');
+    cleanupOldAuditLogs()
+      .then(() => {
+        logger.info('[Audit Cleanup] Cron job dokončený');
+      })
+      .catch((error) => {
+        logger.error('[Audit Cleanup] Cron job zlyhal:', error);
+      });
+  });
+
+  logger.info('[Audit Cleanup] Cron job naplánovaný - každý deň o 00:00');
+};

src/cron/index.js

@@ -1,5 +1,6 @@
 import { logger } from '../utils/logger.js';
 import { startCalendarNotificationCron, triggerEventNotifications, triggerSingleEventNotification } from './calendar/index.js';
+import { startAuditCleanupCron, cleanupOldAuditLogs } from './cleanupAuditLogs.js';
 
 /**
  * Start all cron jobs
@@ -10,8 +11,11 @@ export const startAllCronJobs = () => {
   // Calendar event notifications
   startCalendarNotificationCron();
 
+  // Audit logs cleanup (daily at midnight)
+  startAuditCleanupCron();
+
   logger.info('=== Všetky cron jobs inicializované ===');
 };
 
 // Export individual functions for testing/manual triggers
-export { triggerEventNotifications, triggerSingleEventNotification };
+export { triggerEventNotifications, triggerSingleEventNotification, cleanupOldAuditLogs };