CHW-5505 MetadataStoreUnavailable
package metadata store is not available on this instance; the server started without a metadata backend
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Default message: package metadata store is not available on this instance; the server started without a metadata backend
HTTP status:503(server)
Problem. A vulnerabilities / SBOM endpoint returned 503.
Cause. The process started without a metadata store
(a.metadata == nil) — typically a dev fixture or degraded mode.
Fix. Ask the operator to wire the metadata backend and restart.
HTTP 503.