GAOS Turn-Based Grid SDK v0.7.0

Deterministic multi-wave settlement\n\n- adds a product-neutral deterministic settlement cascade kernel\n- resolves consequences in explicit same-turn waves until quiescence\n- supports repeat, pending-coalesced, and once-per-turn scheduling\n- supports explicit next-turn deferral\n- records causal traces and enforces a convergence limit\n- documents the boundary between SDK scheduling and product mechanics