feat(ansible): Canonical IaC playbook for fleet management

Implements the Ansible Infrastructure as Code story from KT 2026-04-08.

One canonical Ansible playbook defines:
- Deadman switch (snapshot good config on health, rollback+restart on death)
- Golden state config deployment (Anthropic BANNED, Kimi→Gemini→Ollama)
- Cron schedule (source-controlled, no manual crontab edits)
- Agent startup sequence (pull→validate→start→verify)
- request_log telemetry table (every inference call logged)
- Thin config pattern (immutable local pointer to upstream)
- Gitea webhook handler (deploy on merge)
- Config validator (rejects banned providers)

Fleet inventory: Timmy (Mac), Allegro (VPS), Bezalel (VPS), Ezra (VPS)

Roles: wizard_base, golden_state, deadman_switch, request_log, cron_manager

Addresses: timmy-config #442, #443, #444, #445, #446
References: KT Final 2026-04-08 P2, KT Bezalel 2026-04-08 #1-#5

ansible/roles/wizard_base/templates/thin_config.yml.j2

@@ -0,0 +1,41 @@
+# =============================================================================
+# Thin Config — {{ wizard_name }}
+# =============================================================================
+# THIS FILE IS READ-ONLY. Agents CANNOT modify it.
+# It contains only pointers to upstream. The actual config lives in Gitea.
+#
+# Agent wakes up → pulls config from upstream → loads → runs.
+# If anything tries to mutate this → fails gracefully → pulls fresh on restart.
+#
+# Only way to permanently change config: commit to Gitea, merge PR, Ansible deploys.
+#
+# Generated by Ansible on {{ ansible_date_time.iso8601 }}
+# DO NOT EDIT MANUALLY.
+# =============================================================================
+
+identity:
+  wizard_name: "{{ wizard_name }}"
+  wizard_role: "{{ wizard_role }}"
+  machine: "{{ inventory_hostname }}"
+
+upstream:
+  repo: "{{ upstream_repo }}"
+  branch: "{{ upstream_branch }}"
+  config_path: "wizards/{{ wizard_name | lower }}/config.yaml"
+  pull_on_wake: {{ config_pull_on_wake | lower }}
+
+recovery:
+  deadman_enabled: {{ deadman_enabled | lower }}
+  snapshot_dir: "{{ deadman_snapshot_dir }}"
+  restart_cooldown: {{ deadman_restart_cooldown }}
+  max_restart_attempts: {{ deadman_max_restart_attempts }}
+  escalation_channel: "{{ deadman_escalation_channel }}"
+
+telemetry:
+  request_log_path: "{{ request_log_path }}"
+  request_log_enabled: {{ request_log_enabled | lower }}
+
+local_overrides:
+  # Runtime overrides go here. They are EPHEMERAL — not persisted across restarts.
+  # On restart, this section is reset to empty.
+  {}