DOC: Top-level Store removal not in v3 migration guide

[QuLogic]

Describe the issue linked to the documentation

I've found that imagecodecs fails to build with Zarr 3 cgohlke/imagecodecs#123 due to their use of zarr.MemoryStore.

While I linked to the migration guide, a search through it does not have any mention of MemoryStore. I think they should be using zarr.storage.MemoryStore instead, but there's no note there and I don't know if that was available in v2 or not.

Suggested fix for documentation

All zarr.*Store removals should be mentioned in the v3 migration guide along with their replacements.

[d-v-b]

thanks for the report, and sorry for the inconvenience caused here. we should definitely update the guide as you suggest

[OPMTerra]

Hi @d-v-b @QuLogic 👋,

I’d like to help document the store import changes for #2733. If this is not assigned to anyone.

Plan:

• Add a "Store Imports" section to the v3 migration guide
• List replacements like MemoryStore → zarr.storage.MemoryStore
• Include code snippets for v2 vs v3

Is this the right approach?

[d-v-b]

@OPMTerra that sounds great, thanks for your help!

[OPMTerra]

Hi @d-v-b @QuLogic 👋,

My PR #2883 is ready for review!

Changes made:

• Added a table comparing v2/v3 store imports (MemoryStore, DirectoryStore, TempStore)
• Included code examples for migrating from deprecated imports
• Fixed formatting issues flagged during docs build

This should help users avoid confusion like in imagecodecs#123 by clearly showing the new import paths.

Let me know if any adjustments are needed!
Thank you for the guidance! 🙏