Address issue #366:
- Put suite source paths first in worker environments and every entrypoint.
- Resolve inherited host paths before changing the worker working directory.
- Preserve suite precedence when runtime profiles override PYTHONPATH.
- Defer Step device patch loading until its synthesis implementation is imported.
- Correct the Step patch's bundled encoder class and parameter device lookup.
- Add subprocess regressions for six workers and relative host dependencies.
Validation: 22 focused tests, original failure reproduced against HEAD,
Qwen first-use startup and three recreation cycles after Step imports,
and live Step generation/editing before and after a memory-unload request.
diodiogod
10c1f520bf