Support hierarchical scaling with per-axis BF16 and subchannel microscaling in QWIX. - #374
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…caling in QWIX. - Support hierarchical scaling: outer per-axis scaling with BF16 scaling factors followed by inner power-of-2 subchannel microscaling (mxfp4, mxfp8, mxint4, mxint8). - Automatically no-op when the format does not use microscaling. - Add granular configuration options to DotGeneralQtConfig for forward, dlhs, and drhs (separated for grad and residual). - Add comprehensive unit tests in qarray_test and dot_general_qt_test validating accuracy, gradient correctness, and no-op behavior. PiperOrigin-RevId: 980172960
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Support hierarchical scaling with per-axis BF16 and subchannel microscaling in QWIX.