Capture current Ansible control plane state

Commit the accumulated infrastructure work that was living only in the
working tree: monitoring stack, emergency access/bot, gyro allocator,
grimmory, adguard, backup audit and the OpenCode agent definitions.

Also ignore Python bytecode, local archives and Nix/direnv artifacts.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GTocXkGUUazHdKKd3r9k71

ansible/playbooks/monitoring.yml

@@ -0,0 +1,26 @@
+---
+- name: Configure Prometheus exporters
+  hosts: monitoring_exporters
+  gather_facts: false
+  roles:
+    - role: monitoring_exporter
+
+- name: Configure SMART exporters on Proxmox nodes
+  hosts: monitoring_smart_exporters
+  gather_facts: false
+  roles:
+    - role: monitoring_exporter
+      monitoring_exporter_install_node: false
+      monitoring_exporter_install_smart: true
+
+- name: Configure ru-vps external probes
+  hosts: ru-vps
+  gather_facts: false
+  roles:
+    - role: monitoring_blackbox
+
+- name: Configure central monitoring stack
+  hosts: monitoring_server
+  gather_facts: false
+  roles:
+    - role: monitoring_server