Implement parsing for all 15 optional header types found in XEX2 files:
inline values (entry point, base address, stack size, system flags),
fixed-size structures (execution info, file format, TLS, game ratings,
LAN key, checksum/timestamp), and variable-size structures (static
libraries, import libraries, resource info, original PE name, Xbox 360
logo). Add comprehensive unit and integration tests.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
