Drop self-hosted AI (Ollama + SearXNG); gregtime switches to xAI Grok

The Ollama role and SearXNG container backed FISTO AI responses in the
greg-time Discord bot. greg-time 3.9.6 drops both (plus the Gemini path)
in favor of a single xAI Grok backend, so:

- remove the ollama role and its wiring in deploy_home.yml
- remove the searxng container task, template, and searxng_path default
- gregtime: swap OLLAMA_*/SEARXNG_URL/GEMINI_API_KEY env for XAI_API_KEY,
  bump image 3.6.5 -> 3.9.6
- vault: add xai_api_key, drop gemini_api_key

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

ansible/roles/podman/tasks/containers/home/gregtime.yml

@@ -40,14 +40,8 @@
       - host
     env:
       TZ: America/New_York
-      # Ollama + SearXNG for FISTO AI responses
-      OLLAMA_HOST: "http://127.0.0.1:11434"
-      OLLAMA_MODEL: "dolphin-mistral"
-      OLLAMA_FALLBACK_MODEL: "dolphin-phi"
-      OLLAMA_NUM_PREDICT: "300"
-      SEARXNG_URL: "http://127.0.0.1:8080"
-      # Gemini API for @bot gemini command
-      GEMINI_API_KEY: "{{ gemini_api_key }}"
+      # xAI Grok API — the bot's sole AI backend
+      XAI_API_KEY: "{{ xai_api_key }}"
       # Zomboid RCON configuration for Discord restart command
       ZOMBOID_RCON_HOST: "127.0.0.1"
       ZOMBOID_RCON_PORT: "{{ zomboid_rcon_port }}"

ansible/roles/podman/tasks/containers/home/searxng.yml

@@ -1,59 +0,0 @@
----
-- name: create searxng host directory volumes
-  become: true
-  ansible.builtin.file:
-    path: "{{ item }}"
-    state: directory
-    owner: "{{ podman_subuid.stdout }}"
-    group: "{{ podman_user }}"
-    mode: 0755
-  notify: restorecon podman
-  loop:
-    - "{{ searxng_path }}/config"
-    - "{{ searxng_path }}/data"
-
-- name: template searxng settings
-  become: true
-  ansible.builtin.template:
-    src: searxng/settings.yml.j2
-    dest: "{{ searxng_path }}/config/settings.yml"
-    owner: "{{ podman_subuid.stdout }}"
-    group: "{{ podman_user }}"
-    mode: 0644
-
-- name: unshare chown the searxng volumes for internal uid 977
-  become: true
-  become_user: "{{ podman_user }}"
-  changed_when: false
-  ansible.builtin.shell: |
-    podman unshare chown -R 977:977 {{ searxng_path }}/config
-    podman unshare chown -R 977:977 {{ searxng_path }}/data
-
-- name: flush handlers
-  ansible.builtin.meta: flush_handlers
-
-- import_tasks: podman/podman-check.yml
-  vars:
-    container_name: searxng
-    container_image: "{{ image }}"
-
-- name: create searxng container
-  become: true
-  become_user: "{{ podman_user }}"
-  containers.podman.podman_container:
-    name: searxng
-    image: "{{ image }}"
-    restart_policy: on-failure:3
-    log_driver: journald
-    network:
-      - host
-    env:
-      SEARXNG_BASE_URL: "http://127.0.0.1:8080/"
-    volumes:
-      - "{{ searxng_path }}/config:/etc/searxng"
-      - "{{ searxng_path }}/data:/srv/searxng/data"
-
-- name: create systemd startup job for searxng
-  include_tasks: podman/systemd-generate.yml
-  vars:
-    container_name: searxng

ansible/roles/podman/tasks/main.yml

@@ -107,14 +107,9 @@
     image: docker.io/graylog/graylog:7.0.1
   tags: debyltech, graylog
 
-- import_tasks: containers/home/searxng.yml
-  vars:
-    image: docker.io/searxng/searxng:latest
-  tags: searxng
-
 - import_tasks: containers/home/gregtime.yml
   vars:
-    image: localhost/greg-time-bot:3.6.5
+    image: localhost/greg-time-bot:3.9.6
   tags: gregtime
 
 - import_tasks: containers/home/zomboid.yml