Update regional rose-stem to RAL4.beta1 - #764

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iboutle wants to merge 7 commits into

MetOffice:mainfrom

Commits on Sep 4, 2026

rename ral3 to ral4
iboutle
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bb8379c

Commits on Sep 8, 2026

update input files
iboutle
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f34e719
science changes
iboutle
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6dd7f8a
make consistent
iboutle
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cbb3d15
move ancils
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08aa460
kgo updates
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f070ce4
more kgos
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a7cb9e1