VectorX

Added

• New densityFunctionMinMax kernel for BinaryFunction's min/max conditional store (41x-97x)
• New densityFunctionSelect kernel for lerp (6.9x-8.4x) and range_choice (42x, 79x constant form)
• Compatibility entry for C2ME: with c2me-opts-dfc on (its default), all four density hooks are inert (Carver and packed-bits kernels are unaffected)

Changed

• Density hooks follow 26.3's compiled samplers: injected at DensitySampler.sampleVolume instead of PureTransformer.fillArray, and now float-based, which doubles the lane count
• densityFunctionMap targets the sampler classes directly, dropping the reflective Mapped.type() op filter
• The compatibility registry maps one mod to several kernels