chore: Clean up documentation and update various files

- Remove obsolete documentation files
- Update .env_example
- Update ManageUsers components
- Update pending_photos API
- Add verify-all-users script

viewer-frontend/app/admin/users/ManageUsersContent.tsx

@@ -108,7 +108,11 @@ export function ManageUsersContent() {
         setUsers([]);
       } else {
         console.log('[ManageUsers] Successfully loaded', data.users.length, 'users');
-        setUsers(data.users);
+        // Filter out the default admin user (admin@admin.com)
+        const filteredUsers = data.users.filter(
+          (user: User) => user.email?.toLowerCase() !== 'admin@admin.com'
+        );
+        setUsers(filteredUsers);
       }
     } catch (err: any) {
       console.error('[ManageUsers] Error fetching users:', err);