fix: correct require paths and database connection in album processors

- Fix rootPath calculation in all album processors (was going up too many levels)
- Use global \ from connection.php instead of calling openDatabaseConnection()
- Fix cleanup code in save_album.php to use existing \
- Update all processors to use proper config file includes (env.php, session.php, connection.php, functions.php)
- Ensures validateCSRFToken() and other functions are properly available

src/processors/delete_photo.php

@@ -1,15 +1,15 @@
 <?php
-session_start();
+$rootPath = dirname(dirname(__DIR__));
+require_once($rootPath . '/src/config/env.php');
+require_once($rootPath . '/src/config/session.php');
+require_once($rootPath . '/src/config/connection.php');
+require_once($rootPath . '/src/config/functions.php');
 
 if (!isset($_SESSION['user_id']) || $_SERVER['REQUEST_METHOD'] !== 'POST') {
     http_response_code(403);
     exit(json_encode(['error' => 'Forbidden']));
 }
 
-$rootPath = dirname(dirname(dirname(__DIR__)));
-require_once($rootPath . '/connection.php');
-require_once($rootPath . '/functions.php');
-
 // Validate CSRF token
 if (!isset($_POST['csrf_token']) || !validateCSRFToken($_POST['csrf_token'])) {
     http_response_code(400);
@@ -24,8 +24,6 @@ if (!$photo_id) {
     exit(json_encode(['error' => 'Photo ID is required']));
 }
 
-$conn = openDatabaseConnection();
-
 // Get photo and verify ownership through album
 $photoStmt = $conn->prepare("
     SELECT p.photo_id, p.album_id, p.file_path, a.user_id