fix: close file read stream on WebSocket error

Author: rgarcia

src/lib/cp.ts

@@ -210,6 +210,7 @@ async function cpSingleFileToInstance(
 
   return new Promise((resolve, reject) => {
     let settled = false;
+    let fileStream: fs.ReadStream | null = null;
 
     const doResolve = () => {
       if (!settled) {
@@ -221,6 +222,11 @@ async function cpSingleFileToInstance(
     const doReject = (err: Error) => {
       if (!settled) {
         settled = true;
+        // Clean up file stream if open
+        if (fileStream) {
+          fileStream.destroy();
+          fileStream = null;
+        }
         reject(err);
       }
     };
@@ -240,7 +246,7 @@ async function cpSingleFileToInstance(
         ws.send(JSON.stringify({ type: 'end' }));
       } else {
         // Stream file content
-        const fileStream = fs.createReadStream(opts.srcPath, {
+        fileStream = fs.createReadStream(opts.srcPath, {
           highWaterMark: 32 * 1024,
         });