feat: Add Prometheus installation role and playbook

- Created Prometheus role with automated installation
- Version: 2.48.1
- Configured remote_write to VictoriaMetrics (192.168.0.104:8428)
- Added scrape configs for monitoring infrastructure
- Created systemd service configuration
- Successfully tested on 192.168.0.105

roles/prometheus/templates/prometheus.service.j2

@@ -0,0 +1,29 @@
+[Unit]
+Description=Prometheus Monitoring System
+Documentation=https://prometheus.io/docs/
+Wants=network-online.target
+After=network-online.target
+
+[Service]
+User={{ prometheus_user }}
+Group={{ prometheus_group }}
+Type=simple
+ExecStart={{ prometheus_binary_dir }}/prometheus \
+  --config.file={{ prometheus_config_dir }}/prometheus.yml \
+  --storage.tsdb.path={{ prometheus_data_dir }} \
+  --storage.tsdb.retention.time={{ prometheus_retention }} \
+  --web.console.templates={{ prometheus_config_dir }}/consoles \
+  --web.console.libraries={{ prometheus_config_dir }}/console_libraries \
+  --web.enable-lifecycle \
+  --web.enable-admin-api \
+  --log.level={{ prometheus_log_level }}
+
+ExecReload=/bin/kill -HUP $MAINPID
+Restart=on-failure
+RestartSec=5
+StandardOutput=journal
+StandardError=journal
+SyslogIdentifier=prometheus
+
+[Install]
+WantedBy=multi-user.target