Complete get_durable_execution_history implementation

[yaythomas]

Context

Finish implementation in CLI module

Technical Requirements

• Finish implementation in CLI module
• Convert operations to chronological event history

Implementation Details

• File: src/aws_durable_execution_sdk_python_testing/cli.py:378

Acceptance Criteria

• Implementation finished in CLI module
• Operations converted to chronological event history

[wangyb-A]

pending: #68