[ENH] Add preprocessing (scalers and normalizers) to tslib datamodule - #2368

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echo-xiao wants to merge 7 commits into

sktime:mainfrom

echo-xiao:enh/tslib-preprocessing

Commits on Aug 3, 2026

[ENH] tslib dm: wrap scalers/normalizer in ScalerAdapter
echo-xiao
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7fe9a9c
[ENH] tslib dm: fit scalers and target normalizer on train split
echo-xiao
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8767aeb
[ENH] tslib dm: add feature/target transform methods
echo-xiao
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606fc59
[ENH] tslib dm: apply scaling in _preprocess_data with per-series cache
echo-xiao
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823e082
[ENH] tslib dm: fit scalers on train split in setup
echo-xiao
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3c2efc5
[ENH] tslib dm: regression test for no-op default path (no scaler)
echo-xiao
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a87c1a6
[ENH] tslib dm: use English for an inline comment
echo-xiao
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759f3af