Add encoder selector to LZ4 plugin 32004 via cd_values[1]#267
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A new signed `cd_values[1]` slot selects LZ4HC level (positive), fast-encoder acceleration (negative), or the legacy LZ4_compress_default (zero/absent), with HC level clamped to [`LZ4HC_CLEVEL_MIN`, `LZ4HC_CLEVEL_MAX`]. The on-disk chunk format is unchanged, so existing archives and the reverse filter continue to work without modification.
ajelenak
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bmribler,
brtnfld,
fortnern,
glennsong09,
jhendersonHDF,
lrknox and
mattjala
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A new signed
cd_values[1]slot selects LZ4HC level (positive), fast-encoder acceleration (negative), or the legacy LZ4_compress_default (zero/absent), with HC level clamped to [LZ4HC_CLEVEL_MIN,LZ4HC_CLEVEL_MAX]. The on-disk chunk format is unchanged, so existing archives and the reverse filter continue to work without modification.Closes #244.