Add app:infra:snapshot command, page reads from var/infra.json

The /admin/infra page was slow because Docker stats API blocks per container.
Now a cron (every 5min) generates var/infra.json via app:infra:snapshot,
and the page reads the static JSON file instantly.
Mount Docker socket in cron container for snapshot access.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ansible/deploy.yml

@@ -228,6 +228,13 @@
         job: "docker compose -f /var/www/e-ticket/docker-compose-prod.yml exec -T php php bin/console app:stripe:sync --env=prod >> /var/log/e-ticket-stripe-sync.log 2>&1"
         user: bot
 
+    - name: Configure infra snapshot cron (every 5 minutes)
+      cron:
+        name: "e-ticket infra snapshot"
+        minute: "*/5"
+        job: "docker compose -f /var/www/e-ticket/docker-compose-prod.yml exec -T php php bin/console app:infra:snapshot --env=prod >> /var/log/e-ticket-infra.log 2>&1"
+        user: bot
+
   post_tasks:
     - name: Disable maintenance mode
       command: make maintenance_off