Add render artifact model, config, and Seriatim adapter contracts

internal/config/config.go

@@ -28,6 +28,7 @@ type PipelineConfig struct {
 	Audita       AuditaConfig       `yaml:"audita"`
 	Normalize    *NormalizeConfig   `yaml:"normalize"`
 	Trim         *TrimConfig        `yaml:"trim"`
+	Render       *RenderConfig      `yaml:"render"`
 	Scriptorium  *ScriptoriumConfig `yaml:"scriptorium"`
 	Notification NotificationConfig `yaml:"notification"`
 }
@@ -209,6 +210,16 @@ type TrimSeriatimConfig struct {
 	Report *bool `yaml:"report"`
 }
 
+// RenderConfig configures render-stage output formatting behavior.
+type RenderConfig struct {
+	Enabled           *bool  `yaml:"enabled"`
+	Format            string `yaml:"format"`
+	Title             string `yaml:"title"`
+	IncludeTimestamps *bool  `yaml:"include_timestamps"`
+	IncludeSegmentIDs bool   `yaml:"include_segment_ids"`
+	IncludeMetadata   bool   `yaml:"include_metadata"`
+}
+
 // ScriptoriumConfig configures Scriptorium-backed artifact generation.
 type ScriptoriumConfig struct {
 	Binary      string                               `yaml:"binary"`