refactor: replace overloaded surface terminology

packages/bash/bash-local/tests/executor.spec.ts

@@ -307,7 +307,7 @@ describe('process lifecycle ownership (the subprocess service, not the executor)
     const bash = ctx.bash as LocalBashExecutor
 
     // The child prints its own pid ($$ = the detached bash group leader) so
-    // the test can probe liveness through the public read surface alone.
+    // the test can probe liveness through the public read API alone.
     const proc = bash.start(bash.resolve({ command: 'echo $$; sleep 60' }))
     const pid = Number((await readUntil(proc, '\n')).trim())
     expect(Number.isInteger(pid) && pid > 0).toBe(true)