[FEATURE] Integration Validation Endpoint

[Swiddis]

Is your feature request related to a problem?
Per work on integrations, an endpoint needs to be added that can validate an integration. The validation logic was implemented in #1464, so this issue mostly concerns routing.

The endpoint consumes a zip file containing the integrations.

What solution would you like?
The design of the API as a whole is described in #1446, the main action item for this ticket is implementing the /store/{id}/validate endpoint.

What alternatives have you considered?
Validation could be done as a part of the storage process instead of as its own endpoint. This logic should be included, but having a separate endpoint also enables more-expensive full validation of a completed integration, instead of validating individual components.

Do you have any additional context?
Integration Project
#1443

[Swiddis]

Further work requires progress on #1456 to get a consistent idea on how integrations will be processed by the API. Paused to prioritize that.

[derek-ho]

Outdated