type: object
required:
  - version
  - artifact_url
  - sha256
properties:
  version:
    type: string
    description: SemVer string (e.g., 1.2.3)
    pattern: '^[0-9]+\.[0-9]+\.[0-9]+(-[0-9A-Za-z.-]+)?(\+[0-9A-Za-z.-]+)?$'
    example: 1.2.3
  artifact_url:
    type: string
    format: uri
    example: https://update.wlkns.org/v1/projects/demo/releases/1.2.3/artifact
  sha256:
    type: string
    description: Hex-encoded SHA256
    example: 9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08
  sig_url:
    type: string
    format: uri
    nullable: true
    example: https://update.wlkns.org/v1/projects/demo/releases/1.2.3/signature