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/install.yml

@@ -0,0 +1,11 @@
+---
+- name: check if ollama is already installed
+  ansible.builtin.stat:
+    path: /usr/local/bin/ollama
+  register: ollama_binary
+
+- name: install ollama via official install script
+  become: true
+  ansible.builtin.shell: |
+    curl -fsSL https://ollama.com/install.sh | sh
+  when: not ollama_binary.stat.exists