nx_event_queue.nx

nx_event_queue.nx -- substrate-level event dispatch primitive. FIFO event queue with kind-based dispatching. Many primitives I've shipped emit events (xenocell intrusion, treaty breach, health transition, scam pattern). nx_event_queue is the generic substrate for accumulating + dispatching those events to subscribers. Composes: nx_xenocell -- intrusion observations flow into events nx_homeostasis -- migration signals flow into events nx_health_check -- RED transitions flow into events nx_book -- queue-drained events get journaled V1 ships a single global queue per caller; multiplexing across subscribers is the caller's job (V1 returns the next event by kind filter).