…l words

…IMIZED in vectorcall fast path

…_cleanup frames, guard trace dispatch

- Extract datastack_frame_size_bytes_for_code as free function, use it
  to compute init_cleanup stack bytes instead of hardcoded constant
- Add monitoring_disabled_for_code to skip instrumentation for
  synthetic init_cleanup code object in RESUME and execute_instrumented
- Add is_trace_event guard so profile-only events skip trace_func dispatch
- Reformat core.rs (rustfmt)

Dropping values inside with_type_lock can trigger weakref callbacks,
which may access attributes (LOAD_ATTR specialization) and re-acquire
the non-reentrant type mutex, causing deadlock.

Return old values from lock closures so they drop after lock release.