terraform {
  required_version = ">= 1.5.0"
  
  # Enterprise: Remote State Management (Placeholder)
  # backend "s3" {
  #   bucket = "terraform-state"
  #   key    = "prod/infrastructure.tfstate"
  #   region = "eu-central-1"
  # }

  required_providers {
    proxmox = {
      source = "telmate/proxmox"
      version = "3.0.2-rc07" # Pinned as requested
    }
    opnsense = {
      source = "browningluke/opnsense"
      version = "0.16.1"
    }
    vault = {
      source = "hashicorp/vault"
      version = "~> 3.24.0"
    }
  }
}