Give each member its own conversions again after load
- The post-load hook rebuilds each member's versions from the conversions the loader kept.
- A merged converter copies the patterns as passed, so it reverses like its versions.
- WeightTransform keeps a copy of a passed pattern list. It processed the caller's list in place, so a reverse
rewrote the original's own patterns.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
