pub const MAX_KNOWN_SCHEMA_VERSION: i32 = 28;Expand description
The highest schema version this binary knows how to produce. Bump
this in lockstep with each new migrate_vN_to_vM (and add the
matching if current_version < N line in run_migrations).
run_migrations refuses to open a DB whose schema_version is
higher than this — that would mean a newer build wrote it, and
blindly reading would expose missing tables / columns to old code.