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/handler/common.go

@@ -40,6 +40,9 @@ func toUserProfile(u *models.User) dto.UserProfile {
 		IsAdmin:         u.IsAdmin,
 		HeightCM:        u.HeightCM,
 		WeightKG:        u.WeightKG,
+		State:           string(u.State),
+		BlockedReason:   u.BlockedReason,
+		BlockedAt:       u.BlockedAt,
 	}
 	if u.Gender != nil {
 		g := string(*u.Gender)
@@ -69,18 +72,26 @@ func fullProfilePayload(
 	onboardingService *service.OnboardingService,
 	photoRepo *repository.PhotoRepository,
 ) gin.H {
-	selections := make([]selectionSummary, 0, len(models.AllCategoryKeys))
+	// دسته‌ها از کش خونده می‌شن (تغییر به‌ندرت اتفاق می‌افته)، ولی خودِ
+	// انتخاب‌های کاربر توی همه‌ی دسته‌ها با یک کوئری واحد گرفته می‌شه؛ قبلاً
+	// اینجا به‌ازای هر ۶ دسته یک کوئری جدا زده می‌شد.
+	keyToCategoryID := make(map[models.CategoryKey]uint, len(models.AllCategoryKeys))
+	categoryIDs := make([]uint, 0, len(models.AllCategoryKeys))
 	for _, key := range models.AllCategoryKeys {
 		cat, err := optionRepo.GetCategoryByKey(key)
 		if err != nil {
 			continue
 		}
-		sels, err := optionRepo.GetUserSelections(user.ID, cat.ID)
-		if err != nil {
-			continue
-		}
+		keyToCategoryID[key] = cat.ID
+		categoryIDs = append(categoryIDs, cat.ID)
+	}
+
+	selectionsByCategoryID, _ := optionRepo.GetUserSelectionsForCategories(user.ID, categoryIDs)
+
+	selections := make([]selectionSummary, 0, len(models.AllCategoryKeys))
+	for _, key := range models.AllCategoryKeys {
 		summary := selectionSummary{CategoryKey: string(key)}
-		for _, s := range sels {
+		for _, s := range selectionsByCategoryID[keyToCategoryID[key]] {
 			summary.OptionIDs = append(summary.OptionIDs, s.OptionID)
 			if s.Option != nil {
 				summary.Titles = append(summary.Titles, s.Option.Title)