- Remove static constant lookup logic from parseConstFetch method
- Add support for unqualified constants in namespaces with runtime fallback mechanism
- Implement UnqualifiedInNamespace constant lookup strategy for proper PHP behavior
- Update test cases to verify runtime constant resolution works correctly
- Add comprehensive test coverage for namespace constant fallback scenarios
- Remove isValidDefineName validation in favor of direct string checking
- Support define() calls with namespaced and non-identifier constant names
- Add proper error handling for undefined constants in namespaces