- Relaxed qubit-state-machine from a pinned 0.3.1 version to 0.3 range
  in Cargo.toml to allow compatible patch-level updates.
- Regenerated Cargo.lock to align versions and checksums after dependency
  resolution, updating qubit-* dependencies and parse-display/derive chain.
- Updated transitive dependency specifiers to use unpinned dependency names
  where lockfile now resolves compatible newer versions.