CPython Steering Council Mandates Formal Review for JIT Compiler

The CPython Steering Council is enforcing stricter governance over the JIT compiler by requiring a formal Standards Track PEP before development can continue. This decision prevents major experimental features from operating indefinitely without community approval, establishing clearer expectations for how such projects should be evaluated. The pause on new JIT development reflects the council's commitment to transparent, community-driven decision-making on features that impact all Python users.