Refactored the NNUE Network class to expose a reusable state snapshot, track load metadata through atomic shared pointers, and centralize metadata updates in helper utilities used by verify.
Reworked AccumulatorCaches to rely on weight-aware cache bindings for big, small, and Falcon nets, simplifying invalidation and refresh logic while retaining cache alignment utilities.
Adjusted the engine’s network verification logging to avoid redundant NNUE metadata lookups.
