Release v5.3.1

Release: v5.3.1 [skip ci]

Patch

• Make: Fast-forward development branch after releases (45ea890)
• Make: Enable Python memory diagnostics in CI (339f47a)
• Fix: Guard empty reverse sorts (12d5f81)
• Improve: Translate into reusable output buffers (e1d7b8c)
• Fix: Return the text last when rpartition finds no separator (b128ed3)
• Fix: Handle large reverse-search limits w/out integer overflow (1b9b0a5)
• Fix: Match empty searches in default string views (faf71d7)
• Make: Scope CUDA compiler overrides to Windows wheels (d9258a2)
• Fix: Align candidate-lane scratch buffers (5a27cd2)