v0.4.0

v0.4.0 - 2026-04-25

• Fix legacy replay rigid-body normalization across position, velocity, and
  rotation format boundaries, with fixture-backed replay-format documentation.
• Add replay plausibility probes and regression coverage for historical replay
  interpretation.
• Flatten checked-in replay fixture assets and add viewer links for visual
  inspection through the GitHub Pages stats player.
• Add URL preloading to the stats player, including readable replayUrl=
  links and compressed r= replay URL links.
• Improve stats replay loading progress and fixture handling in the viewer.
• Refresh Rust, Python, and JavaScript release metadata to 0.4.0.