v3.15.0rc1
[3.15] gh-149321: Remove lazy_imports=none startup mode (GH-149389) (#150129)
[3.15] gh-148829: Make sentinels' repr and module customizable (GH-149654) (#150092)
[3.15] Correct Stable ABI documentation for METH_FASTCALL (GH-149593) (GH-150853)
gh-142518: add thread safety docs for set C-APIs (#146562)