Add selective error handling for DomainError in tests

- Create handle_solver_error utility function to selectively mark DomainError as broken
- Replace catch blocks in all test files with centralized error handling
- DomainError exceptions now mark tests as broken instead of errored
- Other exceptions are rethrown to maintain proper test failure behavior
- Add new test figures for all problems
- Extensible design allows easy addition of other exception types

Author: ocots