variable "applications" {
  # Multi-env (ADR-0002): each application declares the environments it deploys to.
  # `envs` defaults to ["prod"] so every existing entry is unchanged in behaviour —
  # by the elision rule the prod instance keeps the bare `<app>` identifiers, so its
  # database, owner role, and all derived resources keep their exact current names
  # and Terraform addresses (a no-op plan).
  type = set(object({
    name = string
    envs = optional(list(string), ["prod"])
  }))
}