Publish the Promptkit engine facade

internal/profile/repository_test.go

@@ -57,7 +57,7 @@ func TestFilesystemRepository_GetProfile(t *testing.T) {
 		if err != nil {
 			t.Fatalf("expected no error, got %v", err)
 		}
-		if p.APIKeyEnv != "SCRIPTORIUM_API_KEY" {
+		if p.APIKeyEnv != "PROMPTKIT_API_KEY" {
 			t.Fatalf("unexpected api_key_env: %q", p.APIKeyEnv)
 		}
 		if p.ReasoningEffort != "medium" {

internal/profile/testdata/valid_with_api_key_env.yaml

@@ -1,7 +1,7 @@
 id: local-secure
 endpoint: http://localhost:8000/v1
 model: gpt-4o-mini
-api_key_env: SCRIPTORIUM_API_KEY
+api_key_env: PROMPTKIT_API_KEY
 service_tier: priority
 reasoning_effort: medium
 extra_params: