chore(main): release 1.39.0

[release-please]

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1.39.0 (2025-03-05)

Features

• (Preview) Support diff() for date series (#1423) (521e987)
• (Preview) Support aggregations over timedeltas (#1418) (1251ded)
• (Preview) Support arithmetics between dates and timedeltas (#1413) (962b152)
• (Preview) Support automatic load of timedelta from BQ tables. (#1429) (b2917bb)
• Add allow_large_results option to many I/O methods. Set to False to reduce latency (#1428) (dd2f488)
• Add GeoSeries.boundary() (#1435) (32cddfe)
• Add allow_large_results to peek (#1448) (67487b9)
• Add groupby.rank() (#1433) (3a633d5)
• Iloc multiple columns selection. (#1437) (ddfd02a)
• Support interface for BigQuery managed functions (#1373) (2bbf53f)
• Warn if default ingress_settings is used in remote_functions (#1419) (dfd891a)

Bug Fixes

• Do not compare schema description during schema validation (#1452) (03a3a56)
• Remove warnings for null index and partial ordering mode in prep for GA (#1431) (6785aee)
• Warn if default cloud_function_service_account is used in remote_function (#1424) (fe7463a)
• Window operations over JSON columns (#1451) (0070e77)
• Write chunked text instead of dummy text for pdf chunk (#1444) (96b0e8a)

Performance Improvements

• Speed up DataFrame corr, cov (#1309) (c598c0a)

Documentation

• Add snippet for explaining the linear regression model prediction (#1427) (7c37c7d)

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[tswast]

If possible, I'd like #1448 to get in before merging. Hopefully that'll give the presubmits another chance to run without a force run, too.

[release-please]

🤖 Created releases:

• v1.39.0

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