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Wyatt Alt
8ee7698545
A Function that produces several blobs per row, such as frames from a video, could not declare `pa.list_(lancedb.blob("item"))` as its output: signatures rejected Blob v2 under any collection.
Outputs now accept Blob v2 inside list and large-list fields; the server stores each element as a Blob v2 value. Inputs, fixed-size lists and maps still reject it (lance stores Blob v2 under neither), and the `udf()` docstring now says where Blob v2 may appear.