personal-blog: use the caddy_site role

First service on the role. 31 lines of copy-pasted Caddy plumbing become 7.

Verified: --check before and after the edit reports the same three unrelated
tasks as changed, so the edit introduces nothing. Real run leaves all 14 site
files on all 3 hosts byte-identical, and the blog still answers HTTP 200. A
second consecutive run reports the site task ok with the handler not firing.

Side effect worth noting: the playbook no longer has a perpetually-changed
task. `command: systemctl reload caddy` always reported changed; the role's
handler only fires when the file actually moves.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

ansible/services/personal-blog/deploy_personal_blog_playbook.yml

@@ -8,7 +8,6 @@
     - ./personal_blog_vars.yml
   vars:
     personal_blog_subdomain: "{{ subdomains.personal_blog }}"
-    caddy_sites_dir: "{{ caddy_sites_dir }}"
     personal_blog_domain: "{{ personal_blog_subdomain }}.{{ root_domain }}"
     uptime_kuma_api_url: "https://{{ subdomains.uptime_kuma }}.{{ root_domain }}"
 
@@ -51,36 +50,13 @@
         group: www-data
         mode: '0664'
 
-    - name: Ensure Caddy sites-enabled directory exists
-      file:
-        path: "{{ caddy_sites_dir }}"
-        state: directory
-        owner: root
-        group: root
-        mode: '0755'
-
-    - name: Ensure Caddyfile includes import directive for sites-enabled
-      lineinfile:
-        path: /etc/caddy/Caddyfile
-        line: 'import sites-enabled/*'
-        insertafter: EOF
-        state: present
-        backup: yes
-
-    - name: Create Caddy file server configuration for personal blog
-      copy:
-        dest: "{{ caddy_sites_dir }}/personal-blog.conf"
-        content: |
-          {{ personal_blog_domain }} {
-              root * {{ personal_blog_web_root }}
-              file_server
-          }
-        owner: root
-        group: root
-        mode: '0644'
-
-    - name: Reload Caddy to apply new config
-      command: systemctl reload caddy
+    - name: Publish the blog through Caddy
+      ansible.builtin.include_role:
+        name: caddy_site
+      vars:
+        caddy_site_name: personal-blog
+        caddy_site_domain: "{{ personal_blog_domain }}"
+        caddy_site_root: "{{ personal_blog_web_root }}"
 
     # ═════════════════════════════════════════════════════════════════════════
     # DEPRECATED — Uptime Kuma was decommissioned on 2026-09-11.