feat(vaultwarden): add SMTP configuration options and enhance signup settings

- Introduced SMTP settings for Vaultwarden including host, port, security, and authentication details.
- Added variables for signup verification, 2FA settings, password hints, and logging options.
- Updated Vaultwarden deployment to utilize new SMTP configurations.
- Enhanced Grafana module to support dynamic dashboard and datasource provisioning.
- Added LLM proxy configuration for Open Web UI with necessary environment variables.

ansible/roles/llama_server/templates/llama_exporter.service.j2

@@ -0,0 +1,35 @@
+[Unit]
+Description=LLM Inference Metrics Exporter (llama.cpp + Ollama)
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+User={{ llama_server_exporter_user }}
+Group={{ llama_server_exporter_user }}
+WorkingDirectory={{ llama_server_exporter_install_dir }}
+Environment="LLAMA_EXPORTER_PORT={{ llama_server_exporter_port }}"
+Environment="LLAMA_EXPORTER_BIND=0.0.0.0"
+Environment="LLAMA_EXPORTER_INTERVAL={{ llama_server_exporter_scrape_interval }}"
+Environment="LLAMA_EXPORTER_TIMEOUT={{ llama_server_exporter_scrape_timeout }}"
+{% if llama_server_exporter_targets and llama_server_exporter_targets != "" %}
+Environment="LLAMA_TARGETS={{ llama_server_exporter_targets | to_json }}"
+{% endif %}
+Environment="PATH={{ llama_server_exporter_venv_bin }}:/usr/bin:/bin"
+ExecStart={{ llama_server_exporter_venv_bin }}/python3 {{ llama_server_exporter_script_path }}
+Restart=always
+RestartSec=10
+TimeoutStopSec=10
+StandardOutput=journal
+StandardError=journal
+SyslogIdentifier=llama_exporter
+
+# Security hardening
+ProtectSystem=strict
+ProtectHome=true
+ReadWritePaths={{ llama_server_exporter_install_dir }} /var/log
+NoNewPrivileges=true
+PrivateTmp=true
+
+[Install]
+WantedBy=multi-user.target