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/systemd.yml

@@ -0,0 +1,37 @@
+---
+# =============================================================================
+# Gitea Act Runner - Systemd Service Setup
+# =============================================================================
+#
+# Creates and enables the systemd service for act_runner.
+# This ensures the runner:
+#   - Starts automatically on boot
+#   - Restarts if it crashes
+#   - Can be controlled via systemctl
+#
+# =============================================================================
+
+# Deploy systemd service unit file from template.
+- name: Deploy systemd service file
+  ansible.builtin.template:
+    src: act_runner.service.j2
+    dest: /etc/systemd/system/act_runner.service
+    owner: root
+    group: root
+    mode: '0644'
+  notify:
+    - Reload systemd
+    - Restart act_runner
+
+# Reload systemd to pick up the new/changed unit file.
+# This is immediate (not via handler) to ensure service can be started.
+- name: Reload systemd daemon
+  ansible.builtin.systemd:
+    daemon_reload: true
+
+# Enable and start the act_runner service.
+- name: Enable and start act_runner service
+  ansible.builtin.systemd:
+    name: act_runner
+    state: started
+    enabled: true