type: object
description: Processing metadata for library document processing
properties:
  flow:
    type: string
    description: Flow ID
    example: my-flow
  collection:
    type: string
    description: Collection identifier
    example: default
  status:
    type: string
    description: Processing status
    enum: [pending, processing, completed, failed]
    example: completed
  timestamp:
    type: string
    format: date-time
    description: Processing timestamp
    example: "2024-01-15T10:30:00Z"
  error:
    type: string
    description: Error message if processing failed
    example: Failed to extract text from PDF