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/scripts/deploy_on_webhook.sh

@@ -0,0 +1,75 @@
+#!/usr/bin/env bash
+# =============================================================================
+# Gitea Webhook Handler — Trigger Ansible Deploy on Merge
+# =============================================================================
+# This script is called by the Gitea webhook when a PR is merged
+# to the main branch of timmy-config.
+#
+# Setup:
+#   1. Add webhook in Gitea: Settings → Webhooks → Add Webhook
+#   2. URL: http://localhost:9000/hooks/deploy-timmy-config
+#   3. Events: Pull Request (merged only)
+#   4. Secret: <configured in Gitea>
+#
+# This script runs ansible-pull to update the local machine.
+# For fleet-wide deploys, each machine runs ansible-pull independently.
+# =============================================================================
+
+set -euo pipefail
+
+REPO="https://forge.alexanderwhitestone.com/Timmy_Foundation/timmy-config.git"
+BRANCH="main"
+ANSIBLE_DIR="ansible"
+LOG_FILE="/var/log/ansible/webhook-deploy.log"
+LOCK_FILE="/tmp/ansible-deploy.lock"
+
+log() {
+    echo "[$(date -u +%Y-%m-%dT%H:%M:%SZ)] [webhook] $*" | tee -a "${LOG_FILE}"
+}
+
+# Prevent concurrent deploys
+if [ -f "${LOCK_FILE}" ]; then
+    LOCK_AGE=$(( $(date +%s) - $(stat -c %Y "${LOCK_FILE}" 2>/dev/null || echo 0) ))
+    if [ "${LOCK_AGE}" -lt 300 ]; then
+        log "Deploy already in progress (lock age: ${LOCK_AGE}s). Skipping."
+        exit 0
+    else
+        log "Stale lock file (${LOCK_AGE}s old). Removing."
+        rm -f "${LOCK_FILE}"
+    fi
+fi
+
+trap 'rm -f "${LOCK_FILE}"' EXIT
+touch "${LOCK_FILE}"
+
+log "Webhook triggered. Starting ansible-pull..."
+
+# Pull latest config
+cd /tmp
+rm -rf timmy-config-deploy
+git clone --depth 1 --branch "${BRANCH}" "${REPO}" timmy-config-deploy 2>&1 | tee -a "${LOG_FILE}"
+
+cd timmy-config-deploy/${ANSIBLE_DIR}
+
+# Run Ansible against localhost
+log "Running Ansible playbook..."
+ansible-playbook \
+    -i inventory/hosts.yml \
+    playbooks/site.yml \
+    --limit "$(hostname)" \
+    --diff \
+    2>&1 | tee -a "${LOG_FILE}"
+
+RESULT=$?
+
+if [ ${RESULT} -eq 0 ]; then
+    log "Deploy successful."
+else
+    log "ERROR: Deploy failed with exit code ${RESULT}."
+fi
+
+# Cleanup
+rm -rf /tmp/timmy-config-deploy
+
+log "Webhook handler complete."
+exit ${RESULT}