Signer.GetAddress() should be a sync method

[oleksandrchainsafe]

Acceptance Criteria

Generated by Zenhub AI

• [ ] Scenario: Signer.GetAddress() should be a sync method and return string address directly without Task<>
• Given the Signer.GetAddress() method is currently implemented as an async method with a Task return type
• Then the method should be changed to a sync method and return a string directly without using Task<>
• The method should return the same address as the previous async implementation