Without AUTOINCREMENT, SQLite can reassign the highest deleted ROWID to
a new row. This is a data integrity bug: a deleted entity's ID could be
assigned to a completely different entity, breaking bookmarks, API
caches, and URL stability.
No production instances exist, so safe to rewrite from scratch.
Drops columns that were added then removed (notes, password_hash,
cup rating), standardises timestamp format and primary key style,
and creates all tables in their final form without incremental
ALTER TABLE churn.
