Potential fix for code scanning alert no. 3: Flask app is run in debug mode

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: symysak

backend/src/wsgi.py

@@ -1,4 +1,6 @@
 from app import app
+import os
 
 if __name__ == "__main__":
-    app.run(host='0.0.0.0', port=5000, debug=True)
+    debug_mode = os.getenv('FLASK_DEBUG', 'False').lower() in ['true', '1', 't']
+    app.run(host='0.0.0.0', port=5000, debug=debug_mode)