Shard zarr stores (#47)

Author: WeilerP

pyproject.toml

@@ -19,7 +19,7 @@ urls.Documentation = "https://todo.com"  # TODO
 urls.Source = "https://github.com/url/to/repo.git"
 urls.Home-page = "https://github.com/url/to/repo.git"
 dependencies = [
-    "anndata>=0.12.2",
+    "anndata>=0.12.5",
     "dask",
     "scanpy",
     "zarr>3",

src/fancypackage/io/_zarr.py

@@ -6,6 +6,9 @@
 import anndata as ad
 from anndata import AnnData
 
+ad.settings.zarr_write_format = 3
+ad.settings.auto_shard_zarr_v3 = True
+
 
 def write_zarr(adata: AnnData, path: Path) -> None:
     """Write AnnData to hierarchical Zarr array zip store.