Test

Optimize partial shard reads #6481

Job	Run time
doctests	56s
os=ubuntu-latest, py=3.11, deps=minimal	16m 1s
py=3.11-min_deps	16m 33s
os=ubuntu-latest, py=3.13, deps=minimal	16m 36s
os=macos-latest, py=3.11, deps=optional	15m 22s
os=ubuntu-latest, py=3.12, deps=optional	16m 52s
os=windows-latest, py=3.13, deps=optional	21m 32s
os=ubuntu-latest, py=3.13, deps=optional	18m 0s
os=windows-latest, py=3.11, deps=optional	24m 6s
py=3.13-upstream	24m 2s
os=ubuntu-latest, py=3.12, deps=minimal	15m 12s
os=macos-latest, py=3.13, deps=optional	13m 3s
os=ubuntu-latest, py=3.11, deps=optional	18m 5s
Test complete	3s
	3h 36m 23s

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