ExternalRefInput

"""
Hierarchical external reference for resolving targets using external system coordinates (e.g., MIS job number + component + signature). Resolution walks top-down: job → component (optional) → operation → item.
"""
input ExternalRefInput {
  """External ID of the job in the source system (e.g., MIS job number)"""
  jobExternalId: String
  """External ID of the component within the job"""
  componentExternalId: String
  """External ID of the operation"""
  operationExternalId: String
  """External ID of the operation item (e.g., signature number)"""
  itemExternalId: String
}