- Add sorbet-runtime dependency to gemspec
- Add comprehensive type annotations to Configuration class
- Create RBI file with mixes_in_class_methods for proper class method typing
- Add ActiveSupport::Concern shim to handle included and class_methods DSL
- Add parameter validation for edge cases when RBI bypasses runtime checks
- Update tests to expect correct error messages from manual validation
- All 26 tests passing with full type safety
- Sorbet type checker passes with no errors
This implements the ActiveSupport::Concern DSL generator approach from
https://github.com/Shopify/tapioca/pull/360 to properly handle Sorbet
type checking with ActiveSupport::Concern modules.
