refactor(satp-hermes): error handling and grpc upgrade to 2.0.0 and test fix

[LordKubaya]

1. Enhanced Error Handling using Error.cause
   • Refactored error handling to improve code readability, maintainability, and reliability.
2. Migration Improvements
   • Updated the migration process to ensure seamless compatibility with Connect version 2.0 (v2).
   • Fixed migration-related issues when upgrading to buf version 2.2.2.
3. Testing Enhancements
   • Resolved an issue in the test file to allow individual tests to be executed independently for more effective debugging and validation.

Pull Request Requirements

• Rebased onto upstream/main branch and squashed into single commit to help maintainers review it more efficient and to avoid spaghetti git commit graphs that obfuscate which commit did exactly what change, when and, why.
• Have git sign off at the end of commit message to avoid being marked red. You can add -s flag when using git commit command. You may refer to this link for more information.
• Follow the Commit Linting specification. You may refer to this link for more information.

Character Limit

• Pull Request Title and Commit Subject must not exceed 72 characters (including spaces and special characters).
• Commit Message per line must not exceed 80 characters (including spaces and special characters).

A Must Read for Beginners
For rebasing and squashing, here's a must read guide for beginners.