Add smart service start with automatic log exit

- Service start now follows logs in real-time until service becomes active
- Automatically stops log following when systemctl reports service as active
- Eliminates need for manual Ctrl+C to exit log stream
- Shows final service status after startup completes
- Background monitoring loop checks service state every second

agent/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-agent"
-version = "0.1.75"
+version = "0.1.76"
 edition = "2021"
 
 [dependencies]