feat: implement driving cron actor

src/actors/driving/cron_alerts.rs

@@ -0,0 +1,21 @@
+use crate::app::ports::driving::ForMonitoringAlerts;
+
+pub struct CronAlertsActor {
+    alert_monitor: Box<dyn ForMonitoringAlerts>,
+    period: std::time::Duration,
+}
+
+impl CronAlertsActor {
+    pub fn new(alert_monitor: Box<dyn ForMonitoringAlerts>, period: std::time::Duration) -> Self {
+        Self { alert_monitor, period }
+    }
+
+    pub fn start(&self) {
+        loop {
+            if let Err(e) = self.alert_monitor.alert_on_threshold_violation() {
+                eprintln!("Error occurred: {}", e);
+            }
+            std::thread::sleep(self.period);
+        }
+    }
+}