[30.x] Backports #34856

1. 
   fanquake commented at 6:50 am on March 19, 2026: member

   Backports:

   • #34848
   • #34869
2. cmake: Migrate away from deprecated SQLite3 target

   CMake version 4.3 deprecated the imported target `Sqlite::Sqlite3`.
   Use the preferred name `Sqlite3::Sqlite3` instead and provide an
   alias for older versions of CMake. Also define the same alias when
   using vcpkg.
   
   Github-Pull: #34848
   Rebased-From: 498b6eb6b5e8aceb372d3097df2715d9c7fc416b

   fde84b822e
3. fanquake added this to the milestone 30.3 on Mar 19, 2026
4. DrahtBot added the label Backport on Mar 19, 2026
5. 
   DrahtBot commented at 6:50 am on March 19, 2026: contributor

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6. tests: applied PYTHON_GIL to the env for every test

   Github-Pull: #34869
   Rebased-From: b14f2c76a1f6b41835c134584c82c45704c4cce0

   72d2b85414
7. doc: update release notes for v30.x c535ff02fe
8. fanquake force-pushed on Mar 20, 2026

Contributors
fanquake DrahtBot

Labels
Backport

Milestone
30.3