Initial commit: nult - Ansible deployment toolkit

Merged from veridion-gitea and veridion-act-runner-gitea repos.

nult (Null-T) - instant teleportation from Strugatsky's Noon Universe.
Like Null-T, this toolkit instantly deploys infrastructure.

Roles:
- gitea: Gitea server with PostgreSQL (Docker Compose)
- act_runner: Gitea Actions runner

Playbooks:
- gitea.yml: Deploy Gitea server
- act-runner.yml: Deploy Act Runner
- site.yml: Deploy all services

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

roles/act_runner/tasks/verify.yml

@@ -0,0 +1,80 @@
+---
+# =============================================================================
+# Gitea Act Runner - Installation Verification
+# =============================================================================
+#
+# Verifies that all components were installed correctly.
+# Fails the playbook if any critical check doesn't pass.
+#
+# Verification order:
+#   1. Docker daemon is running and accessible
+#   2. Node.js is installed at the expected version
+#   3. act_runner binary is executable and reports version
+#   4. act_runner systemd service is active
+#
+# =============================================================================
+
+# Verify Docker daemon is running and accessible.
+- name: Verify Docker daemon is accessible
+  ansible.builtin.command: docker info
+  changed_when: false
+  register: act_runner_docker_info_result
+
+- name: Display Docker status
+  ansible.builtin.debug:
+    msg: "Docker is running: {{ act_runner_docker_info_result.stdout_lines[0] | default('OK') }}"
+
+# Verify Node.js is installed at the expected major version.
+- name: Verify Node.js installation
+  ansible.builtin.command: node --version
+  changed_when: false
+  register: act_runner_node_version_result
+
+- name: Verify Node.js major version matches expected
+  ansible.builtin.assert:
+    that:
+      - act_runner_node_version_result.stdout is match('^v' ~ act_runner_nodejs_version ~ '\\.')
+    fail_msg: >-
+      Node.js version mismatch!
+      Expected: v{{ act_runner_nodejs_version }}.x
+      Actual: {{ act_runner_node_version_result.stdout }}
+    success_msg: "Node.js {{ act_runner_node_version_result.stdout }} installed correctly"
+
+# Verify act_runner binary is installed and executable.
+- name: Verify act_runner binary
+  ansible.builtin.command: "{{ act_runner_bin_path }} --version"
+  changed_when: false
+  register: act_runner_version_result
+
+- name: Display act_runner version
+  ansible.builtin.debug:
+    msg: "act_runner version: {{ act_runner_version_result.stdout }}"
+
+# Verify the systemd service is running.
+- name: Get act_runner service status
+  ansible.builtin.systemd:
+    name: act_runner
+  register: act_runner_service_status
+
+- name: Verify act_runner service is active
+  ansible.builtin.assert:
+    that:
+      - act_runner_service_status.status.ActiveState == "active"
+    fail_msg: >-
+      act_runner service is NOT running!
+      State: {{ act_runner_service_status.status.ActiveState }}
+      Check logs: journalctl -u act_runner -n 50
+    success_msg: "act_runner service is running (PID: {{ act_runner_service_status.status.MainPID }})"
+
+# Final summary.
+- name: Verification complete
+  ansible.builtin.debug:
+    msg:
+      - "=========================================="
+      - "All verification checks PASSED!"
+      - "=========================================="
+      - "Docker:      running"
+      - "Node.js:     {{ act_runner_node_version_result.stdout }}"
+      - "act_runner:  {{ act_runner_version_result.stdout }}"
+      - "Service:     active (PID {{ act_runner_service_status.status.MainPID }})"
+      - "=========================================="