Pull effectiveAttackBonus, attackCritFloor, attackConnects, and the
post-hit player damage stack out of combat_engine.go into
combat_primitives.go so the upcoming turn-based engine resolves an
attack identically to auto-resolve. Behavior-preserving — the combat
characterization golden file is unchanged.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
