fix(snappymail): set data dir owner to uid 82 (www-data/Alpine)

SnappyMail container runs as www-data (uid 82 in Alpine).
Directory was created as deploy:deploy (uid 1000) → [202] is_readable() error.
Fix: chown 82:82 on the data directory.

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

roles/tools/tasks/main.yml

@@ -24,9 +24,9 @@
   ansible.builtin.file:
     path: "{{ tools_root }}/snappymail/data"
     state: directory
-    owner: "{{ deploy_user }}"
+    owner: "82"    # www-data uid in Alpine (SnappyMail container user)
-    group: "{{ deploy_group }}"
+    group: "82"
-    mode: "0750"
+    mode: "0755"
 
 # ── TLS certificate for mail.csrx.ru (via certbot + Cloudflare DNS-01) ───────
 - name: Install certbot and Cloudflare DNS plugin