v0.0.4: get_latest_frame mailbox switched to Arc<Vec<u8>> so the capture thread's video_mode re-publish and the mailbox lock both stop cloning 8 MB BGRA buffers. Pull-side rate jumped from ~132/s to ~172/s on flip_demo. Benchmark methodology rewritten too: xxhash on the full frame (no more single-row or grid sampling), valid_fps as the chart metric instead of biased unique_fps, and %changed annotations on mover.py. The honest mover.py story: rustcam delivers ~177 valid fps, bettercam ~60, dxcam ~55, mss ~43, a 3x gap on realistic moving content.