By: Michael Lynch <git@mtlynch.io>
Require complete Tinybeans export metadata Reject Tinybeans exports that omit top-level metadata files or contain subdirectories without entry metadata. This change makes `tinybeans.Parse` fail when `journal.json` or `followers.json` is missing, and when a discovered subdirectory is missing `metadata.json`. The previous behavior silently accepted partial exports by treating those files as optional or by skipping directories. That made it easy to import an incomplete archive without noticing. The updated tests lock in the stricter contract and now expect errors containing `reading journal`, `reading followers`, or `metadata.json` for those incomplete-export cases.