post
https://sandboxapi.legendtrading.com/v2/app/kyc/individual/submit
确认提交KYC信息 (Confirm and Submit KYC)
此为KYC流程的最后一步。在所有信息和文件上传完成后调用此API，通知Legend数据已同步完成。用户状态将变为"已提交"，合规团队将开始审核。
Final step of the KYC process. Call this API after all information and documents are uploaded to notify Legend that data synchronization is complete. The user's status will change to "submitted," triggering a review by the compliance team.