chore: bump container versions and remove n8n

- gitea: 1.25.2 -> 1.26.1 (debyl + skudak)
- caddy: 2.10.2 -> 2.11.2
- uptime-kuma: 2.0.2 -> 2.3.2 (debyl + skudak)
- bookstack: 25.7 -> 26.3.4
- home-assistant: 2026.1 -> 2026.5.1
- immich (server + ML): v2.5.0 -> v2.7.5
- remove n8n service (unused)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

ansible/roles/podman/tasks/containers/debyltech/n8n.yml

@@ -1,54 +0,0 @@
----
-- name: create n8n host directory volumes
-  become: true
-  ansible.builtin.file:
-    path: "{{ item }}"
-    state: directory
-    owner: "{{ podman_user }}"
-    group: "{{ podman_user }}"
-    mode: 0755
-  notify: restorecon podman
-  loop:
-    - "{{ n8n_path }}"
-
-- name: set n8n volume ownership for node user
-  become: true
-  become_user: "{{ podman_user }}"
-  ansible.builtin.command:
-    cmd: podman unshare chown -R 1000:1000 {{ n8n_path }}
-  changed_when: false
-
-- name: flush handlers
-  ansible.builtin.meta: flush_handlers
-
-- import_tasks: podman/podman-check.yml
-  vars:
-    container_name: n8n
-    container_image: "{{ image }}"
-
-- name: create n8n container
-  become: true
-  become_user: "{{ podman_user }}"
-  containers.podman.podman_container:
-    name: n8n
-    image: "{{ image }}"
-    image_strict: true
-    restart_policy: on-failure:3
-    log_driver: journald
-    network: shared
-    volumes:
-      - "{{ n8n_path }}:/home/node/.n8n"
-    ports:
-      - 5678:5678/tcp
-    env:
-      N8N_HOST: "{{ n8n_server_name }}"
-      N8N_PORT: "5678"
-      N8N_PROTOCOL: https
-      WEBHOOK_URL: "https://{{ n8n_server_name }}/"
-      N8N_SECURE_COOKIE: "true"
-      GENERIC_TIMEZONE: America/New_York
-
-- name: create systemd startup job for n8n
-  include_tasks: podman/systemd-generate.yml
-  vars:
-    container_name: n8n