sisl/async: add cqe_awaitable coroutine adapter#320
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Add sisl::async::cqe_awaitable, a C++20 coroutine awaitable that derives from cqe_state and wires _on_complete to resume a stored coroutine_handle<> when complete_cqe_state() fires. Consumers can now build co_await-based io_uring dispatch on sisl's generic callback bridge without duplicating the awaitable machinery. Also add test_cqe_awaitable (4 tests) under the existing stdexec CMake guard. Tests use std::noop_coroutine() as the waiter stand-in to avoid coroutine frame lifetime interactions that affect some ASAN configurations. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Add sisl::async::cqe_awaitable, a C++20 coroutine awaitable that derives from cqe_state and wires _on_complete to resume a stored coroutine_handle<> when complete_cqe_state() fires. Consumers can now build co_await-based io_uring dispatch on sisl's generic callback bridge without duplicating the awaitable machinery.
Also add test_cqe_awaitable (4 tests) under the existing stdexec CMake guard. Tests use std::noop_coroutine() as the waiter stand-in to avoid coroutine frame lifetime interactions that affect some ASAN configurations.