Module raw_task 

Raw task infrastructure for the scheduler 调度器的原始任务基础设施

Uses vtable dispatch for type-erased task execution with manual reference counting (no Arc — avoids Arc/Box layout mismatch).

使用vtable分发进行类型擦除的任务执行，配合手动引用计数 （不使用Arc — 避免Arc/Box布局不匹配）。

Functions

deallocate_completed_task^⚠

Deallocate a completed task (consumes the queue slot ref).

poll_raw_task^⚠

Poll a raw task. Returns true if completed.