playbooks: stop re-runs overwriting live config

Three seeding tasks used copy without force: false, so every run replaced the
real file with the starter one:

- personal-blog: the placeholder index.html over the deployed site.
- lnbits: .env.example over .env - a new AUTH_SECRET_KEY, logging every
  user out, and it would have clobbered a restored .env.
- forgejo: a two-line app.ini stub over the real config, losing
  INTERNAL_TOKEN, the JWT secrets, the DB path and ROOT_URL.

All three now seed a fresh install only. Found while restoring each from
backup on 2026-10-17.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

ansible/services/lnbits/deploy_lnbits_playbook.yml

@@ -85,6 +85,10 @@
         owner: "{{ ansible_user }}"
         group: "{{ ansible_user }}"
         mode: '0644'
+        # Seed a fresh install only. Without this every re-run replaced the real
+        # .env (AUTH_SECRET_KEY and all) with the example, logging every user
+        # out - and would have clobbered a restored one.
+        force: false
 
 
     - name: Configure LNBits environment variables