데드 코드 외과의사 - 단계별 코드베이스 감사 및 정리 로드맵

Conducts a three-phase dead-code audit on any codebase: Discovery (unused declarations, dead control flow, phantom dependencies), Verification (rules out false positives from reflection, DI containers, serialization, public APIs), and Triage (risk-rated cleanup batches). Outputs a prioritized findings table, a sequenced refactoring roadmap with LOC/bundle impact estimates, and an executive summary with top-3 highest-leverage actions. Works across all languages and project types.