fix: add row boundary checks to Triton normalization kernels #103
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Fixed illegal memory access in _rms_norm_fwd_fused, _layer_norm_param_fwd_fused, and _layer_norm_noparam_fwd_fused kernels.
The kernels were missing row boundary checks (rows < M) which caused out-of-bounds memory access when the number of rows M is not divisible by BLOCK_M (32).
Changes: