CKey Format v0.24.0 — Profile 3 Finder Moat and Polar Join

Profile 3 reserves a 13.25-unit radial moat only in each finder’s actual outer corner quadrant. This prevents modules from visually touching finder ink without creating inward wedges. Cartesian payload begins outside radius 30.6; the polar field therefore has only a measured 0.9-unit gap after its longest ray.

Encoders emit format byte 0x18 (decimal 24), profile byte 0x03.