Hyperparameter Tuning, Tracked: Optuna + MLflow

Day 36 of 100 Days of MLOps. Grid search tries every combination blindly. Optuna is smarter — it learns from past trials to focus the search on promising regions and explores continuous ranges, finding good hyperparameters in fewer trials. Wire every trial into MLflow and the whole search is tracked, comparable and reproducible. Runs 100% locally on any OS.