convert stake requester to tagged functions

fix: ASAN issue in stake requester

fix: casting from nullptr is UB

feat: enable UBSAN in debug builds

fix: ASAN issues in beacon module

fix: ASAN issues in asyncio module

fix: memory leaks in testFabric

vendor build improvements, use same compiler as cmake

feat: enable ASAN in debug builds

bugfix: copy only as much as is available

update secp256k1 dependency

basic stream fiber

pass key into constructor

did_send has addr now

sender tracking, close