- Return trace function's return value from trace_event()
to support per-frame f_trace assignment
- Match CPython's trace_trampoline: set f_trace from call
event return value, clear on error
- Fire return event only when frame is traced or profiled
- Remove expectedFailure from passing bdb/settrace tests
- Implement set_f_lineno with stack analysis and deferred unwinding
- Add Frame::set_lasti() for trace callback line jumps
- Implement co_branches() on code objects
- Clear _cache_format in opcode.py (no inline caches)
- Fix getattro slot inheritance: preserve native slot from inherit_slots
- Fix BRANCH_RIGHT src_offset in InstrumentedPopJumpIf*
- Move lasti increment before line event for correct f_lineno
- Skip RESUME instruction from generating line events
- Defer stack pops via pending_stack_pops/pending_unwind_from_stack
to avoid deadlock with state mutex
- Fix ForIter exhaust target in mark_stacks to skip END_FOR
- Prevent exception handler paths from overwriting normal-flow stacks
- Replace #[cfg(feature = "threading")] duplication with PyAtomic<T>
from rustpython_common::atomic (Radium-based unified API)
- Remove expectedFailure from 31 now-passing jump tests
