## Features
* Skip Python runtime objects in callgrind
* Use instrument_hooks markers in walltime
* Declare native extension free-thread safe
* Remove cffi in favor of native extension
* Collect Python toolchain information via instrument hooks environment
API
## Bug Fixes
* Use instrument_hooks_callgrind_add_obj_skip from C API
* Exclude setup time from benchmark in walltime mode
* Fix segfault caused by multiple activate_stack_trampoline
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