All quality gates pass cleanly. Here's the summary:

**Dependency status:** All packages in `Cargo.lock` were already pinned to their latest semver-compatible versions. Both `cargo outdated` and `cargo update` confirmed there was nothing to update.

**Quality gate results:**
- ✅ **format** — `cargo fmt --check` passed
- ✅ **lint** — `cargo clippy --all-targets --all-features -- -D warnings` passed (0 warnings)
- ✅ **test** — 403 unit/integration tests + 14 doctests passed, 0 failures
- ✅ **security-deny** — `cargo deny check` clean (advisories, bans, licenses, sources all OK)
- ✅ **security-audit** — `cargo audit` scanned 268 crate dependencies, no vulnerabilities found

No changes were needed — the dependency tree is current and the project is in good health.