chore(main): release bigframes 2.44.0

[release-please]

🤖 I have created a release beep boop

2.44.0 (2026-06-25)

Features

• add date functions to bigframes.bigquery module (#17514) (e5d2e35)
• bigframes: add AI TVFs to the pandas bq accessor (#17402) (ee74e31)
• Experimental transpilation of unannotated python callables (#17419) (ea9aad9)
• support gemini-3.x models in loader and update default model to gemini-3.5-flash (#17557) (3619b29)
• support interactive execution of deferred DataFrames in TableWidget (#17486) (421eebd)

Bug Fixes

• avoid invalid CAST(NULL AS NULL) in SQLGlot compiler (#17487) (3b79caa)
• bigframes: world-readable temp zip in create_cloud_function (#17522) (e726878)
• bump @angular/common, @angular/forms, @angular/platform-browser and @angular/router in /packages/bigframes/bigframes/display/table_widget_angular (#17525) (2f893b1)
• bump langsmith from 0.8.0 to 0.8.18 in /packages/bigframes (#17518) (f23063f)
• bump msgpack from 1.1.1 to 1.2.1 in /packages/bigframes (#17520) (36b5b7e)
• bump undici and @angular/build in /packages/bigframes/bigframes/display/table_widget_angular (#17519) (6fc45e3)
• handle empty endpoints during cloud function reuse (#17501) (4f5593a)

Documentation

• ensure that PlotAccessor is included in the API reference (#17513) (6febabf)

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[release-please]

🤖 Created releases:

• bigframes-v2.44.0

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