Repair persisted MLP incremental training across the estimator and stochastic optimizer source modules.

Repair persisted MLP incremental training across the estimator and stochastic optimizer source modules.: a task in MiMo-V2.6-RL-oss: Agentic RL Environments (MiMo RL release). Repair incremental training after model persistence The frozen scikit-learn source slice under /app/vendor/scikit-learn…