Enforce explicit edge-case invariants

Enforce narrow configuration and CLI invariants with targeted tests. Prerelease compatibility relaxation applies only to the running/current Craft version: current X.Y.Z-dev.0 may satisfy minVersion through X.Y.Z, but never normalize or weaken the configured minimum. CLI parsing must never consume a following flag as an option value. Treat bare, empty, flag-followed, or otherwise invalid workspace options as invalid and preserve environment fallback where applicable; distinguish valid inline values. Test malformed and repeated options, -- terminators, fallback behavior, and valid/invalid configuration paths.