test(e2e): retry temp-dir removal in cleanup to absorb daemon-exit races

The after-each cleanup can race a just-stopped daemon still flushing files
under the temporary HOME, failing the suite with ENOTEMPTY even though the
test itself passed. Retry the recursive removal with rmSync's built-in
maxRetries/retryDelay instead of failing the hook.

Author: shixi-li

tests/e2e/helpers/e2e-harness.js

@@ -90,7 +90,10 @@ function cleanupE2ERepo(env) {
   if (!env) return;
   for (const dir of [env.repoDir, env.homeDir, env.binDir, env.originDir]) {
     if (dir && fs.existsSync(dir)) {
-      fs.rmSync(dir, { recursive: true, force: true });
+      // A just-stopped daemon can still be flushing files under the temp HOME
+      // while this removal walks it, surfacing as ENOTEMPTY/EBUSY; retry the
+      // removal instead of failing the suite in the after-each hook.
+      fs.rmSync(dir, { recursive: true, force: true, maxRetries: 10, retryDelay: 100 });
     }
   }
 }