Deterministic entropy streams for reproducible testing and procedural generation. Perfect 50/50 statistical distribution with hash verification. Not cryptographically secure - use for testing, worldgen, and scenarios where reproducibility matters more than unpredictability.

确定性熵流，用于可重复测试和程序化生成。具有完美的50/50统计分布和哈希验证。非加密安全，适用于测试、世界生成及其他更强调可重复性而非不可预测性的场景。