fix: Fix duplicate session_start() in API files

- Add session status check before starting session
- Add error reporting settings for debugging
- Prevents potential session conflicts with RateLimitMiddleware

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

api/ticket_dependencies.php

@@ -7,11 +7,19 @@
  * DELETE: Remove a dependency
  */
 
-// Apply rate limiting
+// Capture errors for debugging
+ini_set('display_errors', 0);
+error_reporting(E_ALL);
+
+// Apply rate limiting (also starts session)
 require_once dirname(__DIR__) . '/middleware/RateLimitMiddleware.php';
 RateLimitMiddleware::apply('api');
 
-session_start();
+// Ensure session is started
+if (session_status() === PHP_SESSION_NONE) {
+    session_start();
+}
+
 require_once dirname(__DIR__) . '/config/config.php';
 require_once dirname(__DIR__) . '/models/DependencyModel.php';
 require_once dirname(__DIR__) . '/models/AuditLogModel.php';