ACU: move status_keys into socs

[mhasself]

Description

This moves the "status_keys" submodule from soaculib, into the ACU agent codebase.

Note this PR includes code from #1085 and #1086 (can rebase). I'd prefer each PR to go in separately (or otherwise not be squashed in the history).

Motivation and Context

Rationale documented in corresponding soaculib PR; simonsobs/soaculib#47.

How Has This Been Tested?

Tested with ACU simulator. This is low risk, given the simplicity of the module in question.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[BrianJKoopman]

Note this PR includes code from #1085 and #1086 (can rebase). I'd prefer each PR to go in separately (or otherwise not be squashed in the history).

Sorry, I'm not quite following here (I just don't see matching commit hashes here is all -- edit: well the HVAC ones match, the power one doesn't). Does this contain all of #1085 and #1086? So you'd want to merge those separately, and then drop ca7cc86 and 262e3f1 here during a rebase?

[BrianJKoopman]

Looks good. I compared to the other PRs and answered my own question there. Happy to handle the merge how ever you'd like (or let you hit the button). Comments on the HVAC and power changes are in their respective PRs.