Made start() idempotent (returns Ok if already running instead of error)

Author: f3r10

src/lib.rs

@@ -225,7 +225,8 @@ impl Node {
 		// Acquire a run lock and hold it until we're setup.
 		let mut is_running_lock = self.is_running.write().unwrap();
 		if *is_running_lock {
-			return Err(Error::AlreadyRunning);
+			// Already running, return success (idempotent)
+			return Ok(());
 		}
 
 		log_info!(