fix: fall back to /bin/echo for non-usr-merged distros

dist/post/index.js

@@ -32303,7 +32303,9 @@ process.on("unhandledRejection", (reason) => {
 }))();
 function handleAgentBravoCleanup() {
     return cleanup_awaiter(this, void 0, void 0, function* () {
-        external_child_process_.execFileSync("/usr/bin/echo", ["step_policy_jobend"]);
+        // Non-usr-merged distros (e.g. Debian bullseye) only have /bin/echo.
+        const echoBin = external_fs_.existsSync("/usr/bin/echo") ? "/usr/bin/echo" : "/bin/echo";
+        external_child_process_.execFileSync(echoBin, ["step_policy_jobend"]);
         const doneFile = "/home/agent/done.json";
         let counter = 0;
         while (true) {

src/cleanup.ts

@@ -86,7 +86,9 @@ process.on("unhandledRejection", (reason) => {
 })();
 
 async function handleAgentBravoCleanup() {
-  cp.execFileSync("/usr/bin/echo", ["step_policy_jobend"]);
+  // Non-usr-merged distros (e.g. Debian bullseye) only have /bin/echo.
+  const echoBin = fs.existsSync("/usr/bin/echo") ? "/usr/bin/echo" : "/bin/echo";
+  cp.execFileSync(echoBin, ["step_policy_jobend"]);
 
   const doneFile = "/home/agent/done.json";
   let counter = 0;