Add input-major FC2 performance sidecar

Optional H3ddle sidecar containing the 50 FC2 INT8 matrices in transposed storage order. Source-bound and byte-parity validated; original transformer unchanged.

minimax_h3_fl2va_pruned_turbo_int8_convrot_fc2_input_major.safetensors

@@ -0,0 +1,3 @@
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