YDA-6012: fix silent failure during uploads

When uploading a large file via the Yoda portal, silent failures could occur due to
the CSRF token expiring during the upload. This change makes the CSRF token
valid for the duration of the session, in order to prevent this problem.

app.py

@@ -153,6 +153,7 @@ def load_admin_setting() -> Dict[str, Any]:
 
 # CSRF protection.
 csrf = CSRFProtect(app)
+app.config['WTF_CSRF_TIME_LIMIT'] = None  # Set CSRF token lifetime tied to the life of the session.
 
 
 @app.before_request