feat: user export service. bug and UX fixes. Complete minus outstanding email template fixes.

backend/src/features/maintenance/data/maintenance.repository.ts

@@ -384,4 +384,12 @@ export class MaintenanceRepository {
     );
     return result.rows[0] ? this.mapMaintenanceSchedule(result.rows[0]) : null;
   }
+
+  async findSchedulesByUserId(userId: string): Promise<MaintenanceSchedule[]> {
+    const res = await this.db.query(
+      `SELECT * FROM maintenance_schedules WHERE user_id = $1 ORDER BY created_at DESC`,
+      [userId]
+    );
+    return res.rows.map(row => this.mapMaintenanceSchedule(row));
+  }
 }