Rework save system with ZarrV3 two-tier storage - #6

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JoeyBF wants to merge 13 commits into

zarrs-save-rework

Commits on Jul 8, 2026

Rebase ZarrV3 save-system rework onto current master
claude
committed
93f4063
save: cache opened zarr arrays and lock per-shard, not per-kind
claude
committed
b9d5ea3
save: default stream-tier zstd to level 3, override via EXT_SAVE_ZSTD_LEVEL
claude
committed
4979714
save: reword arrays field doc to satisfy clippy doc_lazy_continuation
claude
committed
572fb26
save: harden a few fallible paths flagged in review
claude
committed
9632e89
save: make SaveDirectory conversion fallible (TryFrom, not panicking From)
claude
committed
6f73a00
save: use as_chunks::<2> for signature parse (nightly clippy lint)
claude
committed
d1e9d94
save: relax new_with_save/construct bound to any TryInto<SaveDirectory>
claude
committed
faf61b1
Address review comments from @hoodmane
claude
committed
189e2dc