Stability checkpoint stable-v1.0.30 (svc) — Phase 4.2 wave continued: 7 MetricsSectionProvider tests pinning per-package complexity aggregation, top-10 sorted DESC, untested-classes alphabetic + non-zero-method filter. Cumulative svc Phase 4.2 across v1.0.21-30: 246 new svc tests across 26 test files. Post-merge main pipeline #718 SUCCESS.