fix: Properly shutdown the context in the CLI

[allenporter]

This avoids leaving open a session after running commands and properly catches exceptions in the CLI commands.

Pulled out from #709

[Copilot]

Pull request overview

This PR aims to properly shutdown the context in the CLI and improve exception handling by adding try-except-finally blocks to the async_command decorator. The changes ensure that resources are cleaned up after running commands and that exceptions are properly caught and logged.

Key Changes:

• Added exception handling with try-except-finally block in the async command decorator
• Added logging for uncaught exceptions and error output to stderr
• Added cleanup call in the finally block to ensure resources are released

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