dracon-sync v0.113.6 — 2026-07-28 Completes v0.113.5: M4 trailing-drain unification via shared apply_outcome function + ApplyOutcome enum (both call sites use the same path; pre-fix divergence structurally impossible). Repos promoted to pub(crate); helper extracted for testability. Regression test test_m4_helper_structurally_unified drives each SyncOutcome variant through the helper. Test posture: 852 passed (was 837 before v0.113.5), 3 ignored. cargo clippy ... -- -D warnings clean. cargo build --release --locked clean. See release-notes-v0.113.6.md for full notes.