fabro-types re-exports the lithos request, response, content, tool, and
stream types and absorbs the identifiers, billing rollup, provider ids,
controls, catalog API views, and Fabro catalog policy (`metadata.fabro`)
that lived in fabro-model. Stored and wire formats use the lithos serde
shapes directly with no compatibility shims.
fabro-auth becomes a lithos `CredentialProvider`: `CredentialSource`
resolves credentials per catalog provider, with env, vault, SQL vault,
extra-headers, and API-key sources.
fabro-config's `[llm]` settings become an opaque TOML overlay layer
(`LlmLayer`) that is applied on top of the lithos built-ins and the Fabro
policy layer.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
