feat(api): show air gap volume in simulate log

[ddcc4]

Overview

When simulate-ing a protocol, the logs just show this for an AIR_GAP command:

Air gap
Logs from this command:
INFO (publisher): command.AIR_GAP: 

whereas the other commands have useful info. I want to see how much air we're aspirating for the air gap. After this change, the logs will look like this:

Air gap of 11.5 uL
Logs from this command:
INFO (publisher): command.AIR_GAP: instrument: Flex 1-Channel 50 µL on right mount, volume: 11.5, height: None

Test Plan and Hands on Testing

I'm mainly relying on the CI tests. I did run simulate with this change and checked the output manually.

Review requests

I am not too familiar with this part of the code.

• Why is the implementation of the simulate logger in legacy_commands? What does "legacy" refer to?
• I don't quite understand how arguments are passed to the functions in legacy_commands/commands.py. How was the code able to work when the function was declared as def air_gap() with no arguments before this change?

Risk assessment

Medium? I don't know if there are consumers of the simulate log who expect the payload never to change.

[sfoster1]

Thank you!