use TokenStream;
/// Embed `.yaml` migrations from a directory at compile time.
/// Returns an `EmbeddedMigrations` value carrying both the compiled-in files and the absolute
/// source directory path, so the runtime can validate against `config.migrations_dir`.
/// Derive `IntoTable` for a named struct.
/// Supports `#[table(name = "...", schema = "...")]` plus column attributes for
/// naming, explicit SQL types, nullability, defaults, keys, indexes, and checks.