add a healthcheck ping

src/main.rs

···
     /// don't actually post
     #[arg(long, action)]
     dry_run: bool,
+    /// send a checkin to this url every 5 mins
+    #[arg(long)]
+    healtcheck_ping: Option<Url>,
 }
 
 struct IssueDetails {
···
     Ok(())
 }
 
+async fn hc_ping(url: Url, client: reqwest::Client) {
+    let mut interval = tokio::time::interval(Duration::from_secs(5 * 60));
+    loop {
+        interval.tick().await;
+        log::trace!("sending healtcheck ping...");
+        if let Err(e) = client
+            .get(url.clone())
+            .send()
+            .await
+            .and_then(reqwest::Response::error_for_status)
+        {
+            log::warn!("error sending healtcheck ping: {e}");
+        }
+    }
+}
+
 #[tokio::main]
 async fn main() -> Result<()> {
     env_logger::init();
···
     let mut receiver = JetstreamConnector::new(jetstream_config)?
         .connect_cursor(args.jetstream_cursor.map(Cursor::from_raw_u64))
         .await?;
+
+    if let Some(hc) = args.healtcheck_ping {
+        log::info!("starting healtcheck ping task...");
+        tokio::task::spawn(hc_ping(hc.clone(), slingshot_client.clone()));
+    }
 
     log::info!("receiving jetstream messages...");
     loop {