Spark 4.1: expose catalog labels via DESCRIBE - #18049
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Surface catalog-provided labels as reserved table properties on the Spark table so they appear in DESCRIBE EXTENDED. The labels metadata table remains the queryable counterpart.
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Part of the catalog-labels stack (spec: #15750). Based on #18048.
Surfaces catalog-provided labels as reserved table properties on the Spark table so they appear in
DESCRIBE EXTENDED. The labels metadata table (#18048) is the queryable counterpart.Stacked on #18048.