feat: add ollama and searxng, migrate to debyl.io hostname

- Add ollama role for local LLM inference (install, service, models)
- Add searxng container for private search
- Migrate hostname from home.bdebyl.net to home.debyl.io
  (inventory, awsddns, zomboid entrypoint, home_server_name)
- Update vault with new secrets

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ansible/roles/ollama/tasks/service.yml

@@ -0,0 +1,23 @@
+---
+- name: create ollama systemd override directory
+  become: true
+  ansible.builtin.file:
+    path: /etc/systemd/system/ollama.service.d
+    state: directory
+    mode: 0755
+
+- name: template ollama environment override
+  become: true
+  ansible.builtin.template:
+    src: ollama.env.j2
+    dest: /etc/systemd/system/ollama.service.d/override.conf
+    mode: 0644
+  notify: restart ollama
+
+- name: enable and start ollama service
+  become: true
+  ansible.builtin.systemd:
+    name: ollama
+    enabled: true
+    state: started
+    daemon_reload: true