v1.7.1

Added

• linalg.WrapInt8 / linalg.WrapInt4 — zero-copy constructors for
  already-quantized WeightMat weights (Experimental). The inverse of the
  Int8()/Int4() accessors: they wrap caller-owned, pre-quantized slices (int8
  • per-row scales; or packed int4 nibbles + per-group scales + group size)
    without copying or re-quantizing, aliasing the caller's backing arrays the
    same way WrapF32 does. This fills the gap that blocked the goinfer
    decoder.weightMat → WeightMat migration: 1.7.0 shipped only quantize-from-f32
    constructors (QuantizeInt8/QuantizeInt4), but the decoder's .giw
    deserialization reads weights already quantized and zero-copy-aliases the int4
    nibbles straight off an mmap'd blob — re-quantizing from f32 would have
    regressed both that fast load and its OS-page-cache residency. The wrap path
    preserves both. Shape-validated (panics on a mismatched length, like
    QuantizeRowsInt8). Additive.