Integrate "Read receipts for desired state" SUP

[matlec]

Description

This PR implements the approved SUP "Read receipts for desired state"
(margo/specification-enhancements#77).

It adds one required field, adoptedManifestVersion, to the
DeploymentStatusManifest. The WFM client reports the manifestVersion of the
most recent state manifest it has adopted for each deployment. This lets the
WFM tell, for each deployment, whether the client has picked up the current
desired state. The field is required, so this is a breaking change to the
status report.

Per the SUP, it also makes one identity rule normative on the desired state
id attribute: when the WFM changes the content of an existing deployment,
the id stays the same and the digest changes. A different id identifies a
different deployment.

Issues Addressed

• Implements SUP Read receipts for desired state specification-enhancements#77
• Contributes to Improve deployment status / desired state mechanics and workflows #156 (does not close it)

Change Type

Please select the relevant options:

• Fix (change that resolves an issue)
• New enhancement (change that adds specification content)
• Content edits (change that edits existing content)

Checklist

• I have read the CONTRIBUTING document.
• My changes adhere to the established patterns, and best practices.