- Fixed bug: decay_info_to_config() was dropping branches, causing
create_config_from_source('paceENSDF') to return single-branch config
- Added BranchConfig import to nuclear_data.py
- Marked B1 (paceENSDF integration) as complete in TODO.md
- Updated README.md with paceENSDF details in Implementation Status
- Updated TODO.md Current Status with v0.3.1 notes