Cargo Workflows

Covers the practical Cargo workflows you'll need beyond basic builds: setting up workspaces with shared dependencies, managing feature flags without shooting yourself in the foot, writing build.rs scripts that actually rebuild when they should, and configuring CI caching that works. Includes cargo-nextest for faster test runs, cargo-deny for dependency auditing, and the workspace.dependencies pattern that keeps version management sane across multi-crate projects. The feature resolver gotchas alone (additivity, resolver v2) will save you debugging time. Solid reference if you're moving past single-crate projects or trying to speed up your CI pipeline without guessing at cache configurations.