fix: add 10s timeout to post_result to prevent hung API calls

apps/monitor/src/runner.rs

@@ -342,11 +342,15 @@ async fn post_result(
     token: &str,
     result: PingResult,
 ) -> Result<()> {
+    tokio::time::timeout(
+        std::time::Duration::from_secs(10),
         client
             .post(format!("{coordinator_url}/internal/ingest"))
             .header("x-monitor-token", token)
             .json(&result)
             .send()
-        .await?;
+    ).await
+        .map_err(|_| anyhow::anyhow!("post_result timed out"))?
+        .map_err(|e| anyhow::anyhow!("{e}"))?;
     Ok(())
 }