🧪 Add test for get_folder_id_by_name API error

[yj9404]

• 🎯 What: The missing test for the API error path in get_folder_id_by_name when fetching folders.
• 📊 Coverage: The scenario where the requests.get call to fetch folders returns an error status and triggers raise_for_status() is now covered.
• ✨ Result: Increased test coverage and improved reliability by ensuring API errors during folder fetching are properly raised and not silently ignored.

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PR created automatically by Jules for task 7144266619550600262 started by @yj9404

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