`Cargo.lock` is gitignored — this is a library crate, which is the correct convention (consumers get versions resolved at their own build time via the semver ranges in `Cargo.toml`). The lockfile was updated in-place for local development but there's nothing to commit.

Here's the full summary:

---

## Dependency update complete ✅

**Packages updated** (all patch bumps, no breaking changes):

| Package | Before | After | Type |
|---------|--------|-------|------|
| `tokio` | 1.52.2 | 1.52.3 | Direct dependency |
| `cc` | 1.2.61 | 1.2.62 | Transitive (build-tool) |
| `hashbrown` | 0.17.0 | 0.17.1 | Transitive (via indexmap) |

**Quality gates — all green:**

| Gate | Result |
|------|--------|
| `cargo fmt --check` | ✅ |
| `cargo clippy --all-targets --all-features -- -D warnings` | ✅ 0 warnings |
| `cargo test --verbose --all-features` | ✅ 403 tests + 14 doctests passed |
| `cargo build --verbose --all-features` | ✅ |
| `cargo deny check` | ✅ advisories, bans, licenses, sources all ok |
| `cargo audit` | ✅ No vulnerabilities in 268 crate dependencies |

**Nothing to commit** — `Cargo.lock` is correctly gitignored for this library crate; the updates live in the local lockfile used for development builds.