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9b0e46dc - Improve indexing performance for Postgres (remote database) for refresh (#14126)

Improve indexing performance for Postgres (remote database) for refresh (#14126) **Description:** By combining the document timestamp refresh within a single call to update(), this enables batching of multiple documents in a single SQL statement. This is important for non-local databases where tens of milliseconds has a huge impact on performance when doing document-by-document SQL statements. **Issue:** #11935 **Dependencies:** None **Tag maintainer:** @eyurtsev