🤖 Use SIGKILL instead of SIGTERM for SSH timeout

SSH processes weren't being killed immediately with SIGTERM, causing
timeout tests to fail. Use SIGKILL (like LocalRuntime does) to ensure
immediate termination when timeout is reached.

Author: ammar-agent

src/runtime/SSHRuntime.ts

@@ -184,14 +184,14 @@ export class SSHRuntime implements Runtime {
 
     // Handle abort signal
     if (options.abortSignal) {
-      options.abortSignal.addEventListener("abort", () => sshProcess.kill());
+      options.abortSignal.addEventListener("abort", () => sshProcess.kill("SIGKILL"));
     }
 
     // Handle timeout
     if (options.timeout !== undefined) {
       setTimeout(() => {
         timedOut = true;
-        sshProcess.kill();
+        sshProcess.kill("SIGKILL");
       }, options.timeout * 1000);
     }