Integrate released catalog sources with effective configuration

internal/configuration/load.go

@@ -104,6 +104,11 @@ var envName = regexp.MustCompile(`^[A-Za-z_][A-Za-z0-9_]*$`)
 var backendFields = []string{"endpoint", "api_key_env", "concurrency_limit", "queue_capacity", "extra_params"}
 var profileFields = []string{"backend", "endpoint", "model", "temperature", "top_p", "max_tokens", "timeout_seconds", "service_tier", "reasoning_effort", "api_key_env", "api_key_required", "extra_params"}
 
+// Load captures one immutable effective configuration for internal consumers.
+func Load(main configkit.Input, underlays []configkit.Underlay) (*loaded, error) {
+	return load(main, underlays)
+}
+
 // load performs one ConfigKit lifecycle over the selected source tiers. Engine
 // assembly is intentionally not connected to this adapter yet.
 func load(main configkit.Input, underlays []configkit.Underlay) (*loaded, error) {

internal/configuration/targets.go

@@ -169,3 +169,11 @@ func (state *loaded) GetProfile(ctx context.Context, id string) (*domain.Executi
 	profile.ResolvedTarget = &target
 	return &profile, nil
 }
+
+// GetBackend returns an independently owned effective backend definition.
+func (state *loaded) GetBackend(id string) (domain.Backend, error) {
+	if state == nil {
+		return domain.Backend{}, fmt.Errorf("backend registry is not configured")
+	}
+	return state.registry.GetBackend(id)
+}