Add healthchecks and resource constraints to all services

Added healthchecks:
- adminer: PHP file_get_contents check
- authentik_server: ak healthcheck command
- authentik_redis: redis-cli ping
- paperless_redis: redis-cli ping
- paperless_webserver: curl localhost:8000
- n8n: wget healthz endpoint
- traefik: wget ping endpoint (with --ping enabled)
- tracker-nginx: curl localhost:80

Added resource limits:
- adminer: 512M limit, 128M reservation
- authentik_server: 1G/1 CPU limit, 512M reservation
- authentik_worker: 1G/1 CPU limit, 512M reservation
- authentik_redis: 512M limit, 128M reservation
- paperless_redis: 512M limit, 128M reservation
- paperless_webserver: 2G/2 CPU limit, 1G reservation
- traefik: 512M/0.5 CPU limit, 256M reservation
- tracker-nginx: 256M limit, 64M reservation

All services now have proper health monitoring and resource constraints
to prevent resource exhaustion and improve reliability.

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

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

stacks/apps/n8n/stack.yml

@@ -15,6 +15,12 @@ services:
     volumes:
     - /home/doc/swarm-data/appdata/n8n:/home/node/.n8n
     - /var/run/docker.sock:/var/run/docker.sock:ro
+    healthcheck:
+      test: ["CMD", "wget", "--quiet", "--tries=1", "--spider", "http://localhost:5678/healthz"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 60s
     deploy:
       replicas: 1
       restart_policy: