feat: add dockcheck update labels and fix Gotify service names

- Add mag37.dockcheck.update labels to audiobookshelf, caddy, gitea services
- Fix Gotify container names in Caddyfile routing
- Add explicit container names for gotify and igotify-assistant services
- Update Authentik to version 2025.6.3
- Fix environment variable format in gotify-compose template

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

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

roles/docker/templates/authentik-compose.yml.j2

@@ -37,7 +37,7 @@ services:
       glance.parent: authentik
       glance.name: Redis
   server:
-    image: ${AUTHENTIK_IMAGE:-ghcr.io/goauthentik/server}:${AUTHENTIK_TAG:-2025.6.2}
+    image: ${AUTHENTIK_IMAGE:-ghcr.io/goauthentik/server}:${AUTHENTIK_TAG:-2025.6.3}
     restart: unless-stopped
     command: server
     environment:
@@ -64,7 +64,7 @@ services:
       glance.description: Authentication server
       glance.id: authentik
   worker:
-    image: ${AUTHENTIK_IMAGE:-ghcr.io/goauthentik/server}:${AUTHENTIK_TAG:-2025.6.2}
+    image: ${AUTHENTIK_IMAGE:-ghcr.io/goauthentik/server}:${AUTHENTIK_TAG:-2025.6.3}
     restart: unless-stopped
     command: worker
     environment: