Add diarization and reusable MVP meeting pipeline

samples/templates/meeting_context.template.yaml

@@ -4,6 +4,8 @@
 schema_version: "1"
 
 meeting:
+  # Stable identifier used for provenance across corrections and later runs.
+  meeting_id: ""
   # Human-readable title for the meeting.
   title: ""
   # Dominant meeting language, for example "de" or "en".
@@ -28,6 +30,12 @@ participants:
     attendance_status: "present"
     notes: null
 
+# Optional authoritative mapping from diarization labels to actual participants.
+# Add entries only after a human or trusted external process confirms identity.
+# Never infer mappings from conversational context. Unmapped labels stay anonymous.
+speaker_mappings: {}
+#  SPEAKER_00: "participant-id"
+
 mentioned_people:
   # People discussed or referenced but not present in the meeting.
   # Mentioned people are not speakers and must not become responsible persons