feat: initial PBS LXC deployment on gihyeon2

pbs.tf

@@ -0,0 +1,57 @@
+# Download Debian 12 LXC template to gihyeon2
+resource "proxmox_virtual_environment_download_file" "debian12_template" {
+  content_type = "vztmpl"
+  datastore_id = "local"
+  node_name    = "gihyeon2"
+  url          = "http://download.proxmox.com/images/system/debian-12-standard_12.12-1_amd64.tar.zst"
+}
+
+# PBS LXC Container on gihyeon2
+resource "proxmox_virtual_environment_container" "pbs" {
+  description   = "Proxmox Backup Server - Managed by Terraform"
+  node_name     = "gihyeon2"
+  vm_id         = 200
+  start_on_boot = true
+  unprivileged  = true
+  tags          = ["infra", "backup", "terraform"]
+
+  operating_system {
+    template_file_id = proxmox_virtual_environment_download_file.debian12_template.id
+    type             = "debian"
+  }
+
+  cpu {
+    cores = 1
+  }
+
+  memory {
+    dedicated = 2048
+    swap      = 512
+  }
+
+  disk {
+    datastore_id = "local-lvm"
+    size         = 16
+  }
+
+  # SDN network interface
+  network_interface {
+    name   = "eth0"
+    bridge = var.pbs_network_bridge
+  }
+
+  initialization {
+    hostname = "pbs"
+
+    ip_config {
+      ipv4 {
+        address = var.pbs_ip_address
+        gateway = var.pbs_gateway
+      }
+    }
+
+    dns {
+      servers = var.dns_servers
+    }
+  }
+}