OrangePool v3.1

New Var validations
Destroy trace by magic number to help debug
CPU affinity

OrangePool v 3.0

Fixed-size worker pool
Bounded queue (backpressure support)
Non-blocking and blocking submit
Graceful shutdown (drain)
Immediate shutdown (drop pending jobs safely)
Timed shutdown
Per-task destructor support
Runtime metrics (stats)
Fully tested concurrency behavior
Doxygen documentation