v3.15.0a7
GH-144679: When building with VS 2026 on Windows, use PlatformToolset v145 by default (GH-144680)
gh-118347: Fix Windows installer not updating launcher (GH-118386)
bpo-47171: Enable installing the py.exe launcher on Windows ARM64 (GH-32203)
gh-132930: Implement PEP 773 (GH-132931)
gh-137964: Remove the "experimental" designation from the Windows installer (GH-137965)
Optimize images by IMGbot (GH-21348)
gh-112984 Update Windows build and installer for free-threaded builds (GH-113129)
Issue #25102: Windows installer does not precompile for -O or -OO.
gh-138896: Fix error installing C runtime on non-updated Windows machines (GH-138932)
Issue #23260: Update Windows installer
Enables building compressed Windows test builds with --pack option.
