v2.4.0: Self-Improvement Loop - Phase 8 Adaptive Learning System

Complete Adaptive Learning implementation:
- Feedback Collection (explicit, implicit, outcomes)
- Learning Engine (preferences, patterns, corrections)
- Adaptation Manager (behavior modification, regression prevention)
- Performance Tracking & Quality Analysis

Target metrics: 89% acceptance rate, 1.1 corrections/task, 4.7/5.0 satisfaction