123: Support process arrays

[pjhartzell]

Related Issue(s):

• Support for process arrays #123

Proposed Changes:

1. Accept a list of process definition dictionaries.
2. And continue to accept a bare dictionary for the process definition, but emit a Deprecation warning.
3. Some decent massaging of the README.

PR Checklist:

• I have added my changes to the CHANGELOG or a CHANGELOG entry is not required.

[jkeifer]

The code is all good, there's just some minor subtleties in the error message language that I think need to be worked out to avoid communicating inaccurate messaging to users.

Note that all of this special casing and trying to work out what the error is if we just adopted something like pydantic to parse the incoming payloads into types: if that fails then pydantic can provide much better error messages with regard to the problem.

Oh look, we already have a head start on this for someday in the future: https://github.com/Element84/swoop/blob/main/src/swoop/api/models/workflows.py#L206. 😁

[pjhartzell]

Note that all of this special casing and trying to work out what the error is if we just adopted something like pydantic to parse the incoming payloads into types: if that fails then pydantic can provide much better error messages with regard to the problem.

Oh look, we already have a head start on this for someday in the future: https://github.com/Element84/swoop/blob/main/src/swoop/api/models/workflows.py#L206. 😁

Nice. Yeah, this is something I'm interested in getting in here at some point.