refactor: use module_defaults for proxmox API connection

- Replace YAML merge keys (<<:) with module_defaults block in main.yml
- Simplify connection variables to individual vars instead of dictionary
- Remove redundant connection params from individual task files
- Document standalone task usage requires play-level module_defaults
- Update README examples with new variable pattern

roles/proxmox_lxc_provision/tasks/main.yml

@@ -1,50 +1,66 @@
 ---
-- name: Check if container exists
-  community.general.proxmox:
-    <<: "{{ proxmox_api_connection }}"
-    vmid: "{{ lxc_vmid }}"
-    state: current
-  register: existing_container
-  ignore_errors: true
-
-- name: Skip if container already exists
-  meta: end_host
-  when: existing_container is succeeded
-
-- name: Container source must be defined (lxc_clone_from or lxc_template)
-  ansible.builtin.fail:
-    msg: "Neither lxc_clone_from or lxc_template are defined"
-  when: lxc_clone_from is undefined and lxc_template is undefined
-
-- name: Clone container from another container or template, then update
-  when: lxc_clone_from is defined
+- name: Proxmox LXC provision
+  module_defaults:
+    community.general.proxmox: &proxmox_defaults
+      api_host: "{{ proxmox_api_host }}"
+      api_port: "{{ proxmox_api_port }}"
+      api_user: "{{ proxmox_api_user }}"
+      api_token_id: "{{ proxmox_api_token_id }}"
+      api_token_secret: "{{ proxmox_api_token_secret }}"
+      validate_certs: "{{ proxmox_api_validate_certs }}"
+      node: "{{ proxmox_node }}"
+    community.proxmox.proxmox_lxc_info: *proxmox_defaults
   block:
-    - name: Clone from template
-      ansible.builtin.include_tasks: clone.yaml
-      register: clone_result
+    - name: Check if container exists
+      community.general.proxmox:
+        vmid: "{{ lxc_vmid }}"
+        state: current
+      register: existing_container
+      ignore_errors: true
 
-    - name: Update container
-      ansible.builtin.include_tasks: update.yaml
+    - name: Skip if container already exists
+      meta: end_host
+      when: existing_container is succeeded
+
+    - name: Container source must be defined (lxc_clone_from or lxc_template)
+      ansible.builtin.fail:
+        msg: "Neither lxc_clone_from or lxc_template are defined"
+      when: lxc_clone_from is undefined and lxc_template is undefined
+
+    - name: Clone container from another container or template, then update
+      when: lxc_clone_from is defined
+      block:
+        - name: Clone from template
+          ansible.builtin.include_tasks:
+            file: clone.yml
+          register: clone_result
+
+        - name: Update container
+          ansible.builtin.include_tasks:
+            file: update.yml
+          vars:
+            lxc_vmid: "{{ clone_result.vmid }}"
+          register: lxc_result
+
+    - name: Create the new container
+      ansible.builtin.include_tasks:
+        file: create.yml
+      when: lxc_template is defined and lxc_clone_from is undefined
+
+    - name: Start the created container and wait for ssh
       vars:
-        lxc_vmid: "{{ clone_result.vmid }}"
-      register: lxc_result
+        lxc_vmid: "{{ lxc_result.vmid }}"
+      ansible.builtin.include_tasks:
+        file: "{{ item }}"
+      loop:
+        - start.yml
+        - wait.yml
+      when: lxc_start
 
-- name: Create the new container
-  ansible.builtin.include_tasks: create.yaml
-  when: lxc_template is defined and lxc_clone_from is undefined
-
-- name: Start the created container and wait for ssh
-  vars:
-    lxc_vmid: "{{ lxc_result.vmid }}"
-  ansible.builtin.include_tasks: "{{ item }}"
-  loop:
-    - start.yaml
-    - wait.yaml
-  when: lxc_start
-
-- name: Post clone updates
-  when: lxc_clone_from is defined
-  delegate_to: "{{ lxc_hostname }}"
-  block:
-    - name: Include post-clone tasks
-      ansible.builtin.include_tasks: post-clone.yaml
+    - name: Post clone updates
+      when: lxc_clone_from is defined
+      delegate_to: "{{ lxc_hostname }}"
+      block:
+        - name: Include post-clone tasks
+          ansible.builtin.include_tasks:
+            file: post-clone.yml