Added

• Added CompletionQueue for waiting on multiple I/O operations.
• Added blocking I/O support for socket, pipe, poll, timer, and work operations. These operations can now be called from any thread without an async runtime.

Changed

• Improved our CI setup, run significanly more tests in multi-threaded mode to catch possible race conditions.

Fixed

• Fixed task migration race condition that could cause crashes under heavy multi-threaded load.
• Fixed pipe read/write using wrong offset in io_uring backend.
• Fixed NetBSD test failures.