Add Notarius configuration profile support

internal/config/pipeline_configkit_test.go

@@ -3,6 +3,7 @@ package config
 import (
 	"os"
 	"path/filepath"
+	"reflect"
 	"strings"
 	"testing"
 )
@@ -161,6 +162,45 @@ func TestNotariusCredentialProfileReplacementAndProvenance(t *testing.T) {
 	}
 }
 
+func TestNotariusConfigProfileComposition(t *testing.T) {
+	tests := []struct {
+		name        string
+		baseValue   string
+		overlayName string
+		overlay     string
+		want        *string
+	}{
+		{name: "omitted"},
+		{name: "explicit empty", baseValue: `""`, want: stringPointer("")},
+		{name: "explicit default", baseValue: "default", want: stringPointer("default")},
+		{name: "base named selection", baseValue: "production", want: stringPointer("production")},
+		{name: "profile replaces named selection", baseValue: "production", overlayName: "testing", overlay: "notarius:\n  config_profile: inexpensive\n", want: stringPointer("inexpensive")},
+		{name: "profile clears named selection", baseValue: "production", overlayName: "testing", overlay: "notarius:\n  config_profile: null\n"},
+	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			dir := t.TempDir()
+			rootYAML := "whisperx:\n  transcribe_url: https://transcription.example.test/transcribe\nnotarius:\n  enabled: false\n"
+			if test.baseValue != "" {
+				rootYAML += "  config_profile: " + test.baseValue + "\n"
+			}
+			root := writePipelineFixture(t, dir, "pipeline.yml", rootYAML)
+			options := PipelineLoadOptions{}
+			if test.overlayName != "" {
+				writePipelineFixture(t, dir, "profiles/"+test.overlayName+".yml", test.overlay)
+				options.Profile = &test.overlayName
+			}
+			cfg, err := LoadPipelineWithOptions(root, options)
+			if err != nil {
+				t.Fatal(err)
+			}
+			if cfg.Notarius == nil || !reflect.DeepEqual(cfg.Notarius.ConfigProfile, test.want) {
+				t.Fatalf("config profile = %#v, want %#v", cfg.Notarius.ConfigProfile, test.want)
+			}
+		})
+	}
+}
+
 func TestNotariusCredentialRootProvenance(t *testing.T) {
 	const envName = "NARRATIO_NOTARIUS_ROOT_KEY"
 	t.Setenv(envName, "synthetic-notarius-root-key")