MilestoneAchievedevent type

Milestone achieved (terminal state). Triggers I13 stale-marking for AI interpretations whose derived_from_node_ids include this milestone.

Full spec

{
  "name": "MilestoneAchieved",
  "description": "Milestone achieved (terminal state). Triggers I13 stale-marking for AI interpretations whose derived_from_node_ids include this milestone.",
  "current_version": 1,
  "actor_type_allowed": [
    "human"
  ],
  "object_type": "Milestone",
  "payload_versions": {
    "v1": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "milestone_id",
        "achieved_by",
        "achieved_at_date"
      ],
      "properties": {
        "milestone_id": {
          "type": "string",
          "format": "uuid"
        },
        "achieved_by": {
          "type": "string",
          "format": "uuid"
        },
        "achieved_at_date": {
          "type": "string",
          "format": "date"
        },
        "exit_criteria_evidence": {
          "type": "array",
          "items": {
            "type": "string"
          },
          "default": []
        }
      }
    }
  },
  "projections_consuming": [
    "milestones_view",
    "timeline_view",
    "audit_log"
  ],
  "canonicalizer_module": "event-canonicalizers/milestone_achieved.ts"
}