Update teaclave SDK

[qinkunbao]

Description

This PR removes some magic numbers in Teaclave Python SDK.

Checklist

• [x] Fork the repo and create your branch from master.
• [x] If you've added code that should be tested, add tests.
• [x] If you've changed APIs, update the documentation.
• [x] Ensure the tests pass (see CI results).
• [x] Make sure your code lints/format.