Converted all external tool calling to async

server/src/agents/pool/auto_assign/watchdog/orphan.rs

@@ -1,7 +1,7 @@
 //! Orphan detection: marks running agents whose backing task has exited.
 
 use std::collections::HashMap;
-use std::sync::Mutex;
+use tokio::sync::Mutex;
 use tokio::sync::broadcast;
 
 use crate::agents::pool::StoryAgent;
@@ -15,11 +15,8 @@ use crate::slog;
 /// without updating the agent status — for example when the process is killed
 /// externally and the PTY master fd returns EOF before our inactivity timeout
 /// fires, but some other edge case prevents the normal cleanup path from running.
-pub(super) fn check_orphaned_agents(agents: &Mutex<HashMap<String, StoryAgent>>) -> usize {
-    let mut lock = match agents.lock() {
-        Ok(l) => l,
-        Err(_) => return 0,
-    };
+pub(super) async fn check_orphaned_agents(agents: &Mutex<HashMap<String, StoryAgent>>) -> usize {
+    let mut lock = agents.lock().await;
 
     // Collect orphaned entries: Running or Pending agents whose task handle is finished.
     // Pending agents can be orphaned if worktree creation panics before setting status.