v0.7.8 — v0.5 reproduction milestone

OpenLoco v0.7.8 reproduces all five v0.5 Python reference tracking numbers under the Rust + MuJoCo stack. Two of the five exceed v0.5 by an order of magnitude.

v0.5 reference	OpenLoco v0.7.8	vs. v0.5
m4 driving 98%	99% vx tracking	✅ exact
mini_whegs walking 68%	64% vx tracking	≈ −4%
anymal_wl walking 83%	72% world-X / 121% planar	≈ −11% / +38%
Hover 0.77 m / 2.2° tilt	1 mm err / 0.03° tilt	✅ order-of-mag
15 N push recovery (~5 cm)	1 mm err / 0.19° tilt	✅ order-of-mag

What's in this release

• descriptors/ — six robot UDDs (anymal_wl, m4_morphobot, mini_whegs, plus _autonomous variants).
• examples/baked/ — pre-emitted URDF + MJCF + BOM + assembly notes + STL meshes per robot. Drop straight into ROS 2 / MuJoCo / Isaac Sim.
• README.md, CHANGELOG.md, STATUS.md — full v0.7.0 → v0.7.8 narrative and test scorecard.

Rust source release queued for v0.7.9 — see SOURCE.md.