e3eeba4650
Phase 1 of resilience testing design doc implementation: - New musicfs-test-utils crate with FaultyOrigin, FaultyCasStore, fixtures - Failpoints instrumented in musicfs-cas/store.rs - 16 resilience tests (13 RED for missing features, 3 GREEN for existing) - 3 Docker/Toxiproxy network tests (RED until docker-compose up) - docker-compose.yml for Toxiproxy + MinIO + SFTP test infrastructure Tests properly fail-first (TDD): check_all() sequential, no health timeout, missing corruption detection, no passthrough mode, etc.