fix(deploy): download preprocessors in Dockerfile + harden predict/counterfactuals

feat(llm): wire Generate AI Report button into EngineeringMode

fix: What-If scenarios now correctly trigger for positive predictions regardless of confidence

feat: dynamic DiCE counterfactuals with 3-state clinical rendering

feat(app): integrate DiseaseProvider, DiseaseSelector, and DynamicClinicalForm

feat(core): apply production security updates, fix infrastructure bugs, and add SHAP service

feat(ui): build React dashboard with engineering and clinical EMR modes