Generated files carried the RelSpec version and build date, so every
rebuild produced a diff even when the schema was unchanged.
- bun, gorm, drizzle: remove the GeneratedBy template field and line
- pgsql, mssql, sqlite: emit a constant "-- Generated by RelSpec"
- bun: replace the version header test with a version-free assertion
pkg/buildinfo is unchanged and still backs the CLI version.
warkanum
e1df3b7cee