feat(terraform): add Proxmox VM and Unifi DHCP modules (Phase 2)

terraform/unifi/dhcp/main.tf

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+# ─── DHCP Static Reservation ─────────────────────────────────────────────────
+# Creates a fixed IP assignment on the UDM Pro for the newly provisioned VM.
+# Triggered by n8n after Proxmox VM creation returns the MAC address.
+
+resource "unifi_user" "vm" {
+  name       = var.hostname
+  mac        = lower(var.mac_address)
+  fixed_ip   = var.ip_address
+  network_id = var.network_id
+
+  note = "Managed by mk-labs pipeline"
+}

terraform/unifi/dhcp/outputs.tf

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+output "reservation_id" {
+  description = "Unifi user/client ID for the DHCP reservation."
+  value       = unifi_user.vm.id
+}

terraform/unifi/dhcp/providers.tf

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+terraform {
+  required_version = ">= 1.5.0"
+
+  required_providers {
+    unifi = {
+      source  = "paultyng/unifi"
+      version = ">= 0.41.0"
+    }
+  }
+}
+
+provider "unifi" {
+  username = var.unifi_username
+  password = var.unifi_password
+  api_url  = var.unifi_api_url
+
+  # Set to true if using a self-signed certificate
+  allow_insecure = true
+}

terraform/unifi/dhcp/terraform.tfvars.example

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+# Copy this file to terraform.tfvars and fill in the values.
+# terraform.tfvars is in .gitignore — never commit secrets.
+
+unifi_username = "admin"
+unifi_password = "your-password-here"
+unifi_api_url  = "https://10.1.0.1:443"
+
+# These values come from n8n via -var flags at runtime:
+# hostname    = "test-vm"
+# mac_address = "AA:BB:CC:DD:EE:FF"
+# ip_address  = "10.1.71.100"
+# network_id  = "your-server-trusted-network-id"

terraform/unifi/dhcp/variables.tf

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+# ─── Provider Authentication ─────────────────────────────────────────────────
+
+variable "unifi_username" {
+  type        = string
+  description = "Unifi controller username."
+  sensitive   = true
+}
+
+variable "unifi_password" {
+  type        = string
+  description = "Unifi controller password."
+  sensitive   = true
+}
+
+variable "unifi_api_url" {
+  type        = string
+  description = "Unifi controller API URL (e.g., https://10.1.0.1:443)."
+}
+
+# ─── DHCP Reservation ───────────────────────────────────────────────────────
+
+variable "hostname" {
+  type        = string
+  description = "Hostname for the DHCP reservation. Used as the client name."
+}
+
+variable "mac_address" {
+  type        = string
+  description = "MAC address of the VM network interface (from Terraform Proxmox output)."
+}
+
+variable "ip_address" {
+  type        = string
+  description = "Fixed IP address for the DHCP reservation (without CIDR, e.g., 10.1.71.100)."
+}
+
+variable "network_id" {
+  type        = string
+  description = "Unifi network ID for the DHCP reservation."
+  default     = ""
+}