Implement render stage runtime and integrate it into pipeline execution

internal/app/runner.go

@@ -12,6 +12,7 @@ import (
 	"gitea.maximumdirect.net/eric/narratio/internal/adapters/scriptorium"
 	"gitea.maximumdirect.net/eric/narratio/internal/adapters/seriatim"
 	"gitea.maximumdirect.net/eric/narratio/internal/adapters/whisperx"
+	"gitea.maximumdirect.net/eric/narratio/internal/artifactmodel"
 	"gitea.maximumdirect.net/eric/narratio/internal/artifacts"
 	"gitea.maximumdirect.net/eric/narratio/internal/config"
 	"gitea.maximumdirect.net/eric/narratio/internal/logging"
@@ -410,6 +411,8 @@ func mapResultOutputs(stageName string, result *stage.StageResult, runID string)
 		if stageName == "analyze" {
 			sourceID = artifacts.ConfiguredArtifactSourceID(ref.Kind)
 			kind = "scriptorium_artifact"
+		} else {
+			sourceID = sourceIDForOutputKind(kind)
 		}
 		out = append(out, manifest.ArtifactRecord{
 			Kind:          kind,
@@ -424,6 +427,22 @@ func mapResultOutputs(stageName string, result *stage.StageResult, runID string)
 	return out
 }
 
+func sourceIDForOutputKind(kind string) string {
+	trimmed := strings.TrimSpace(kind)
+	if trimmed == "" {
+		return ""
+	}
+	if trimmed == "session_bounds" {
+		return artifacts.ArtifactBoundsSession
+	}
+	for _, spec := range artifactmodel.RuntimeTranscriptArtifacts() {
+		if spec.OutputKind == trimmed {
+			return spec.SourceID
+		}
+	}
+	return ""
+}
+
 func applyStageResultToManifest(m *manifest.Manifest, stageName string, result *stage.StageResult) {
 	if m == nil || result == nil {
 		return