Runs one repository example in deterministic check mode in a fresh VM.
mix snodo.example ../../examples/11_tasks_sqlite.exsThe child uses the active project's directory, resolved build path, and Mix
environment. This also preserves environments selected by preferred_envs,
which do not necessarily appear in the inherited MIX_ENV variable.
The script receives exactly --check; compiler warnings and a non-zero child
exit fail the task. Optional packages can use this task from their aliases
without loading the example's application processes into the quality runner.