CHW-5302 PackageStoreFailure

package store request failed; retry shortly or check the backend health endpoint

Default message: package store request failed; retry shortly or check the backend health endpoint
HTTP status: 500 (server)

Problem. A package_slugs / package_versions / package_permissions DB call failed. Cause. Transient backend failure or a schema migration in flight. Fix. Retry shortly or check the backend health endpoint. HTTP 500.