Huma's SchemaLinkTransformer (enabled by default) emits a `$schema`
field on every JSON response and an example URL in the spec. Both were
broken in our setup: the example URL used Huma's "https://example.com"
placeholder because no Servers were declared, and the runtime URL
pointed at /schemas/Label.json instead of /api/v2/schemas/Label.json
because Huma can't see the Echo group prefix.
Two changes:
- Set OpenAPI Servers to a list with the relative GroupPrefix first and,
if service.publicurl is configured, the absolute deployment URL
second. Servers[0] feeds Huma's getAPIPrefix / addSchemaField /
Transform fallback; Servers[1] is informational metadata for SDK
generators and docs UIs. Keeping the relative URL at index 0 dodges a
Huma quirk that double-prefixes the runtime $schema URL when the
index-0 server URL carries a path component.
- Add /api/v2/schemas/:schema to unauthenticatedAPIPaths so editors and
SDK tooling can fetch schemas without a token, mirroring how the spec
itself is reachable.
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