Please make a complete correct example (0.9.1)

[t80060869s]

Please make a complete correct example (0.9.1) for a fictitious but working test configuration (0.8.1).

[user@viktorpc DevOpsLab]$ tree 
.
├── iso
│   └── Rocky-10-GenericCloud-Base.latest.x86_64.qcow2
└── terraform
    ├── cloud_init
    │   └── common.yml
    ├── main.tf
    ├── outputs.tf
    └── variables.tf

4 directories, 5 files
[user@viktorpc DevOpsLab]$ 

common.yml:

hostname: ${hostname}
fqdn: ${hostname}.localdomain
manage_etc_hosts: true

users:
  - name: devops
    sudo: ALL=(ALL) NOPASSWD:ALL
    groups: users, admin, wheel
    home: /home/devops
    shell: /bin/bash
    lock_passwd: false
    ssh_authorized_keys:
      - ${ssh_key}

packages:
  - qemu-guest-agent
  - net-tools

runcmd:
  - systemctl enable --now qemu-guest-agent

variables.tf:

variable "ssh_key_path" {
  description = "Path to the public SSH key (on the host)"
  type        = string
  default     = "~/.ssh/id_ed25519_lab.pub"
}

variable "iso_path" {
  description = "Absolute path to the source image (Generic Cloud Image)"
  type        = string
  default = "/home/user/projects/DevOpsLab/iso/Rocky-10-GenericCloud-Base.latest.x86_64.qcow2"
}

variable "pool_path" {
  description = "Where the virtual machine disks will be physically located"
  type        = string
  default     = "/var/lib/libvirt/images/devops-lab-pool"
}

variable "vm_memory" {
  description = "Amount of RAM for virtual machines (in MB)"
  type        = string
  default     = "4096"
}

variable "vm_vcpu" {
  description = "Number of vCPU cores"
  type        = number
  default     = 2
}

variable "disk_size" {
  description = "System disk size (in bytes). 20GB = 21474836480"
  type        = number
  default     = 21474836480
}

outputs.tf:

output "pg_master_ip" {
  description = "Master node IP address"
  value = libvirt_domain.pg_master.network_interface.0.addresses
}

output "pg_slave_ip" {
  description = "Slave node IP address"
  value       = libvirt_domain.pg_slave.network_interface.0.addresses
}

main.tf:

terraform {
  required_version = ">= 1.10"
  required_providers {
    libvirt = {
      source = "dmacvicar/libvirt"
      version = "0.8.1"
    }
  }
}

provider "libvirt" {
  uri = "qemu:///system"
}

# --- 1. STORAGE ---

resource "libvirt_pool" "devops_lab" {
  name = "devops-lab-pool"
  type = "dir"
  target {
    path = var.pool_path
  }
}

resource "libvirt_volume" "rocky_base" {
  name   = "rocky-10-base.qcow2"
  pool   = libvirt_pool.devops_lab.name
  source = var.iso_path
  format = "qcow2"
}

# --- 2. CLOUD-INIT ---

data "local_file" "ssh_key" {
  filename = pathexpand(var.ssh_key_path)
}

resource "libvirt_cloudinit_disk" "master_init" {
  name = "master_init.iso"
  pool = libvirt_pool.devops_lab.name

  meta_data = <<-EOF
    instance-id: pg-master-id
    local-hostname: pg-master
  EOF

  user_data = templatefile("${path.module}/cloud_init/common.yml", {
    hostname = "pg-master"
    ssh_key  = trimspace(data.local_file.ssh_key.content)
  })
}

resource "libvirt_cloudinit_disk" "slave_init" {
  name = "slave_init.iso"
  pool = libvirt_pool.devops_lab.name

  meta_data = <<-EOF
    instance-id: pg-slave-id
    local-hostname: pg-slave
  EOF

  user_data = templatefile("${path.module}/cloud_init/common.yml", {
    hostname = "pg-slave"
    ssh_key  = trimspace(data.local_file.ssh_key.content)
  })
}

# --- 3. LINKED CLONES ---

resource "libvirt_volume" "pg_master_disk" {
  name = "pg-master.qcow2"
  pool = libvirt_pool.devops_lab.name
  base_volume_id = libvirt_volume.rocky_base.id
  size           = var.disk_size
}

resource "libvirt_volume" "pg_slave_disk" {
  name           = "pg-slave.qcow2"
  pool           = libvirt_pool.devops_lab.name
  base_volume_id = libvirt_volume.rocky_base.id
  size           = var.disk_size
}

# --- 4. DOMAINS ---

# VM: Postgres Master
resource "libvirt_domain" "pg_master" {
  name   = "pg-master"
  memory = var.vm_memory
  vcpu   = var.vm_vcpu

  cpu {
    mode = "host-passthrough"
  }

  network_interface {
    network_name = "default"
    wait_for_lease = true
  }

  disk {
    volume_id = libvirt_volume.pg_master_disk.id
  }

  disk {
    file = "${libvirt_pool.devops_lab.target[0].path}/${libvirt_cloudinit_disk.master_init.name}"
  }

  graphics {
    type        = "spice"
    listen_type = "address"
    autoport    = true
  }

  video {
    type = "virtio"
  }

  console {
    type        = "pty"
    target_port = "0"
    target_type = "virtio"
  }
}

# VM: Postgres Slave
resource "libvirt_domain" "pg_slave" {
  name   = "pg-slave"
  memory = var.vm_memory
  vcpu   = var.vm_vcpu

  cpu {
    mode = "host-passthrough"
  }

  network_interface {
    network_name   = "default"
    wait_for_lease = true
  }

  disk {
    volume_id = libvirt_volume.pg_slave_disk.id
  }

  disk {
    file = "${libvirt_pool.devops_lab.target[0].path}/${libvirt_cloudinit_disk.slave_init.name}"
  }

  graphics {
    type        = "spice"
    listen_type = "address"
    autoport    = true
  }

  video {
    type = "virtio"
  }

  console {
    type        = "pty"
    target_port = "0"
    target_type = "virtio"
  }
}

Even the examples from the repository cause errors for me.

Show me how to do it correctly, please.