fix: increase Docmost health check retries to 30 (5 min total)

First deploy needs time for DB migrations and initial setup.
30×10s = 300s gives enough buffer for cold start.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

roles/services/tasks/main.yml

@@ -145,6 +145,6 @@
   ansible.builtin.command: docker exec docmost wget -qO- http://127.0.0.1:3000/api/health
   register: docmost_health
   changed_when: false
-  retries: 15
+  retries: 30
   delay: 10
   until: docmost_health.rc == 0