Add trim configuration contract

examples/pipeline.minimal.yml

@@ -43,6 +43,22 @@ audita:
   validation_llm_concurrency: 1
   report: true
 
+trim:
+  enabled: true
+  # Session-workdir-relative when not absolute.
+  output_path: "transcripts/trimmed.json"
+  bounds:
+    prompt_id: "dnd_session.bounds"
+    # Empty means use prompt default profile.
+    profile_id: ""
+    transcript_input_name: "transcript"
+    output_path: "artifacts/session_bounds.json"
+    timeout: "10m"
+    render_debug: false
+    render_output_path: "artifacts/session_bounds.render.json"
+  seriatim:
+    report: false
+
 scriptorium:
   binary: "scriptorium"
   config_path: "/etc/scriptorium/config.yml"