- Add pkg/buildinfo with Version/BuildDate (set via ldflags, VCS fallback);
cmd/relspec now sources version info from it
- Emit "RelSpec <version> (built: <date>)" in generated file headers for
bun, gorm, drizzle, pgsql (incl. migration), mssql, sqlite writers
- pgsql writer: getSortedColumns now sorts by Sequence then Name so the
streaming WriteSchema/WriteDatabase path preserves source column order
- dbml reader: mergeTable re-bases merged-in column Sequence values past the
existing max, fixing colliding sequences (and alphabetical fallback) when a
table is split across multiple DBML files
- Tests for bun/gorm header + column order, and dbml multi-file merge ordering