[Testing] Complete get_durable_execution_history implementation

[dhegberg]

Migration from aws/aws-durable-execution-sdk-python-testing#36

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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