docs: document Rust blob v2 column helper#278
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Summary
Document the new Rust helper for declaring Lance blob v2 columns, exposed by the latest LanceDB Rust SDK.
Changes
>= 2.2and pairs with stable row ids.Context
The Rust SDK now ships a convenience function that builds an Arrow field with the
lance.blob.v2extension marker and the struct layout Lance expects on write. Users previously had to set thelance-encoding:blobmetadata by hand to opt into blob-encoded storage; the new helper makes the blob v2 schema declaration explicit and ensures the table is created with a compatible storage format.