Add admin user moderation: block/unblock, reports, matches list, photo review

- User blocking (with reason) now closes the auth gap immediately — a
  blocked user's still-valid access token stops working on the next
  request, not just on their next OTP/refresh.
- Admin-created reports (moderation notes) per user, viewable in a history
  list independent of block status.
- GET /admin/users: full paginated, searchable user list with report counts.
- GET /admin/matches: all matches across the app ("friends" who mutually
  liked each other), for admin visibility.
- GET/DELETE /admin/photos: paginated feed of every uploaded photo with
  uploader info, so admins can review and remove content without going
  user-by-user.
- Per-user activity: monitoring requests can now be filtered by user_id, so
  a user's detail page can show their recent API activity.
- Batched the profile-selections query in fullProfilePayload (was 6 queries
  per view, now 1) for consistency with the earlier N+1 fixes.

internal/repository/user_repository.go

@@ -80,6 +80,25 @@ func (r *UserRepository) ListPendingApproval() ([]models.User, error) {
 	return users, err
 }
 
+// ListAll همه‌ی کاربران رو صفحه‌بندی‌شده برمی‌گردونه (برای صفحه‌ی «همه‌ی
+// کاربران» پنل ادمین)؛ search روی شماره موبایل و اسم کوچیک می‌گرده.
+func (r *UserRepository) ListAll(search string, limit, offset int) ([]models.User, int64, error) {
+	query := r.db.Model(&models.User{})
+	if search != "" {
+		like := "%" + search + "%"
+		query = query.Where("phone ILIKE ? OR first_name ILIKE ?", like, like)
+	}
+
+	var total int64
+	if err := query.Count(&total).Error; err != nil {
+		return nil, 0, err
+	}
+
+	var users []models.User
+	err := query.Order("created_at desc").Limit(limit).Offset(offset).Find(&users).Error
+	return users, total, err
+}
+
 // ListDiscoverable کاندیداهای بخش دوستیابی رو برمی‌گردونه: تاییدشده، فعال،
 // جنسیت مخالف کاربر (به‌عنوان ساده‌ترین فرض پیش‌فرض؛ فیلد ترجیح جنسیتی/گرایش
 // هنوز توی سیستم وجود نداره) و کسایی که قبلاً روشون سواپ نزده.