Silent failure of DockerAgent.push_image() due to absense of exception handling

[jopemachine]

What Operating System(s) are you seeing this problem on?

Linux (x86-64)

Backend.AI version

main

Describe the bug

If the credential information or access token is incorrect, DockerAgent.push_image() fails, but the session export process is still marked as completed successfully on the terminal.

❯ ./backend.ai session convert-to-image dae2abe4-63a0-4ca9-9530-6a35643e965a test
∙ Request to commit Session(name or id: dae2abe4-63a0-4ca9-9530-6a35643e965a)
✓ Session export process completed.

backend.ai/src/ai/backend/agent/docker/agent.py

Line 1346 in 859b09d

await docker.images.push(image_ref.canonical, auth=auth_config)

For example, when DockerAgent.push_image() fails, you can tell that the request failed from the following output.

However, the user is informed that the session commit request was successful, and no error messages are displayed on the manager or agent consoles.

# Print the response value of push_image to the terminal
[{'status': ...  
{'status': 'Waiting', 'progressDetail': {}, 'id': '2a81f40e5b59'}, {'status': 'Waiting', 'progressDetail': {}, 'id': '9f54eef41275'}, 
{'errorDetail': {'message': 'denied: Your Authorization Token is invalid.'}, 'error': 'denied: Your Authorization Token is invalid.'}]

To Reproduce

Committing the session after recording an incorrect value in the password

Expected Behavior

A success message should only be displayed in the case of success.

Anything else?

No response