IBM's Granite PatchTST-FM-r2: SOTA zero-shot time series forecasting under Apache 2.0

The ~385M-parameter model ranks second for CRPS and MASE among replicable zero-shot models on GIFT-Eval and first among permissively licensed ones. Conformer blocks, 8,192-step context, 99 quantiles, Apache-2.0 and OpenMDW-1.0.