* Fix pgsql reader double-quoting defaults: normalizePostgresDefault strips
surrounding SQL string literal quotes from column_default before storing,
matching the convention used by every other reader.
* Add NullableTypes field to WriterOptions with NullableTypeResolveSpec
(default) and NullableTypeStdlib constants.
* Both bun and gorm TypeMappers now accept a typeStyle parameter. stdlib
mode produces sql.NullString/NullInt32/NullTime etc. for nullable scalars,
plain Go slices for arrays, and time.Time for NOT NULL timestamps. Default
resolvespec behaviour is unchanged.
* Add --types flag to convert and split commands.
* Update bun/README.md and gorm/README.md with side-by-side generated code
examples, updated type mapping tables, and Writer Options documentation.
* Introduce `--flatten-schema` flag to convert, merge, and split commands.
* Modify database writing functions to support flattened schema names.
* Update template functions to handle schema.table naming convention.
* Enhance PostgreSQL writer to utilize flattened schema in generated SQL.
* Update tests to ensure compatibility with new flattening feature.
* Dependencies updated for improved functionality.
* Update model name generation to include schema name.
* Add gofmt execution after writing output files.
* Refactor relationship field naming to include schema.
* Update tests to reflect changes in model names and relationships.
* Update relationship field naming conventions for has-one and has-many relationships.
* Implement logic to ensure unique field names by tracking used names.
* Add tests to verify new naming conventions and uniqueness constraints.
* Implement SanitizeFilename function to clean identifiers
* Remove quotes, comments, and invalid characters from filenames
* Update filename generation in writers to use sanitized names
* Introduced GUID field to Database, Domain, DomainTable, Schema, Table, View, Sequence, Column, Index, Relationship, Constraint, Enum, and Script models.
* Updated initialization functions to assign new GUIDs using uuid package.
* Enhanced DCTX reader and writer to utilize GUIDs from models where available.
