docs: update CLAUDE.md and PE class docstring for Phase 3 code review
- CLAUDE.md line 166: Update FrameOp enum documentation to include ALLOC_SHARED and FREE_LANE
- CLAUDE.md lines 292-293: Update FrameAllocated and FrameFreed event signatures to include lane and frame_freed fields
- emu/pe.py class docstring: Update Manages section to reflect current 3D match storage, lane_free tracking, and lane_count