lukaszraczylo fdb81640ec feat: model registry with discovery and aggregated /v1/models
Adds modelRegistry: per-provider explicit+discovered model sets, bare-id
and provider-prefixed resolution with sorted-name collision precedence,
group authorization pairing (allowsModel AND allowsProvider), and a
group-filtered OpenAI-compatible /v1/models catalog.

Discovery is lazy and throttled per provider: newGateway runs a
synchronous 5s-bounded warm fill for discovery-enabled providers
(non-fatal on error), and Gateway.ServeHTTP triggers a throttled,
inFlight-guarded background refresh per provider per interval
(default 1h, per-provider DiscoveryInterval parsed at construction).
A failed refresh keeps the previous discovered set (stale-while-error).

Wires GET /v1/models into ServeHTTP (auth required, 401 envelope
otherwise) and gives Gateway its adapters/registry fields, both built
in newGateway.

newModelRegistry's signature gained an error return beyond the task
brief's literal listing: an invalid DiscoveryInterval must be a
constructor error per the controller ruling, which the brief's bare
*modelRegistry signature could not express.
2026-08-20 10:08:48 +01:00
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