feat(provider): add iterator for provider info summaries

Co-Authored-By: Virgil <virgil@lethean.io>

pkg/provider/registry.go

@@ -153,6 +153,40 @@ func (r *Registry) Info() []ProviderInfo {
 	return infos
 }
 
+// InfoIter returns an iterator over all registered provider summaries.
+// The iterator snapshots the current registry contents so callers can range
+// over it without holding the registry lock.
+func (r *Registry) InfoIter() iter.Seq[ProviderInfo] {
+	r.mu.RLock()
+	providers := slices.Clone(r.providers)
+	r.mu.RUnlock()
+
+	return func(yield func(ProviderInfo) bool) {
+		for _, p := range providers {
+			info := ProviderInfo{
+				Name:     p.Name(),
+				BasePath: p.BasePath(),
+			}
+			if s, ok := p.(Streamable); ok {
+				info.Channels = s.Channels()
+			}
+			if rv, ok := p.(Renderable); ok {
+				elem := rv.Element()
+				info.Element = &elem
+			}
+			if sf, ok := p.(interface{ SpecFile() string }); ok {
+				info.SpecFile = sf.SpecFile()
+			}
+			if up, ok := p.(interface{ Upstream() string }); ok {
+				info.Upstream = up.Upstream()
+			}
+			if !yield(info) {
+				return
+			}
+		}
+	}
+}
+
 // SpecFiles returns all non-empty provider OpenAPI spec file paths.
 // The result is deduplicated and sorted for stable discovery output.
 func (r *Registry) SpecFiles() []string {

pkg/provider/registry_test.go

@@ -173,6 +173,40 @@ func TestRegistry_Info_Good_ProxyMetadata(t *testing.T) {
 	assert.Equal(t, "http://127.0.0.1:9999", info.Upstream)
 }
 
+func TestRegistry_InfoIter_Good(t *testing.T) {
+	reg := provider.NewRegistry()
+	reg.Add(&fullProvider{})
+
+	var infos []provider.ProviderInfo
+	for info := range reg.InfoIter() {
+		infos = append(infos, info)
+	}
+
+	require.Len(t, infos, 1)
+	info := infos[0]
+	assert.Equal(t, "full", info.Name)
+	assert.Equal(t, "/api/full", info.BasePath)
+	assert.Equal(t, []string{"stub.event"}, info.Channels)
+	require.NotNil(t, info.Element)
+	assert.Equal(t, "core-full-panel", info.Element.Tag)
+}
+
+func TestRegistry_InfoIter_Good_SnapshotCurrentProviders(t *testing.T) {
+	reg := provider.NewRegistry()
+	reg.Add(&fullProvider{})
+
+	iter := reg.InfoIter()
+	reg.Add(&specFileProvider{specFile: "/tmp/later.json"})
+
+	var infos []provider.ProviderInfo
+	for info := range iter {
+		infos = append(infos, info)
+	}
+
+	require.Len(t, infos, 1)
+	assert.Equal(t, "full", infos[0].Name)
+}
+
 func TestRegistry_Iter_Good(t *testing.T) {
 	reg := provider.NewRegistry()
 	reg.Add(&stubProvider{})