Add GPU monitoring services and configurations

- Create systemd service templates for llama_exporter, nvidia_exporter, and podman.
- Add Prometheus configuration template for GPU metrics scraping.
- Introduce variables for GPU monitoring role in main.yml.
- Implement tasks for syncing llama models, including user setup and package installation.
- Update podman tasks to ensure proper sudo access and lingering for the podman user.
- Modify inventory to include gpu_monitoring group.
- Add Terraform modules for deploying Vaultwarden, including ingress and service configurations.
- Create Grafana dashboard for real-time GPU monitoring metrics.
- Update secrets and environment files to include Vaultwarden admin token.

ansible/roles/gpu_monitoring/tasks/firewall.yml

@@ -0,0 +1,13 @@
+---
+- name: Add Prometheus firewall rules
+  become: true
+  community.general.ufw:
+    rule: allow
+    src: "{{ item.cidr }}"
+    port: "{{ prometheus_fw_port | string }}"
+    proto: "{{ prometheus_fw_proto }}"
+    comment: "{{ item.comment | default(omit) }}"
+  loop: "{{ prometheus_fw_allowed_networks }}"
+  loop_control:
+    label: "{{ item.cidr }} -> port {{ prometheus_fw_port }}"
+  when: item.cidr is defined and item.cidr | length > 0