feat: add Palmr file sharing service to replace Pingvin

- Add Palmr Docker Compose template with encryption enabled
- Create Palmr deployment tasks for productivity category
- Add files.thesatelliteoflove.com routing in Caddyfile
- Restore files subdomain for Palmr service
- Add Palmr to Glance dashboard with file icon
- Generate and store encryption key in vault
- Configure HTTPS, Authentik integration, and dockcheck updates

🤖 Generated with [Claude Code](https://claude.ai/code)

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

group_vars/all/domains.yml

@@ -21,6 +21,7 @@ subdomains:
   tasks: "tasks.{{ primary_domain }}"  # MMDL
   syncthing: "syncthing.{{ primary_domain }}"
   loclog: "loclog.{{ primary_domain }}"  # Dawarich
+  files: "files.{{ primary_domain }}"  # Palmr file sharing
   social: "social.{{ primary_domain }}"  # GoToSocial
   post: "post.{{ primary_domain }}"  # Postiz
   home: "home.{{ primary_domain }}"  # Glance