b1fd30af67
Add 5 comprehensive tests for CorsSettings in TDD red phase: - cors_settings_deserialize_from_yaml: YAML deserialization - cors_settings_default_has_empty_origins: Default values - cors_settings_with_wildcard_deserializes: Wildcard origin handling - settings_loads_cors_section_from_yaml: Settings integration - cors_settings_deserialize_with_defaults: Partial deserialization Tests are intentionally failing (red phase) as CorsSettings struct will be implemented in T010. Follows TDD requirement to write tests before implementation. Ref: T009 (specs/001-modbus-relay-control/tasks.md)