Coalesce and parallelize partial shard reads#3004

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aldenks wants to merge 14 commits intozarr-developers:mainfrom

aldenks:coalesce-shard-reads

Commits on Jul 21, 2025

Fix and test for case where some chunks in shard are all fill
aldenks
committed

Commits on Aug 6, 2025

Merge branch 'main' into coalesce-shard-reads
d-v-b
authored