Support key-value metadata on deployments

[polivbr]

First check

• [X] I added a descriptive title to this issue.
• [X] I used the GitHub search to find a similar request and didn't find it.
• [X] I searched the Prefect documentation for this feature.

Prefect Version

2.x

Describe the current behavior

Prefect currently supports adding tags to a deployment, but these are simple strings and are awkward to use for capturing metadata.

Describe the proposed behavior

It would be very useful if deployments (among other things) supported capturing key-value metadata, similar to kubernetes annotations or labels.

Example Use

This functionality would be very useful for processing events via webhooks. For example, I would like to be able to write an event-driven framework that would launch deployments in response to certain triggers. Rather than having to store the trigger conditions externally, it would be very handy if I could store the conditions as metadata attached to the deployment. I could imagine something like:

trigger-on: flow-event?state=completed&flow=<source-flow>&deployment<source deployment> or trigger-on: blob-update?<... parameters ...>

Which could be extracted and handled via custom code.

Additional context

No response

[github-actions[bot]]

This issue is stale because it has been open 30 days with no activity. To keep this issue open remove stale label or comment.

[bpolivka]

Ping

[tekumara]

Looks similar to #5735

[github-actions[bot]]

This issue is stale because it has been open 30 days with no activity. To keep this issue open remove stale label or comment.