v0.6.0

What's Changed

• Group imports per crate with rustfmt by @emostov in #72
• Cap agent key lifetime, add key revocation, and document shared-key brokers by @emostov in #73
• Document the policy negation operator by @emostov in #74
• Add tk update to replace the binary in place by @emostov in #70
• Polish docs and skills, not just Rust code by @emostov in #80
• Default Git signing to a profile-pinning wrapper, keep agent signing off the human's setup, interpolate policy placeholders, and split agent identity from secrets by @emostov in #77
• Trim activity votes, document GitHub GPG upload, and name the next step on failed login by @emostov in #76
• Release 0.6.0 by @emostov in #81

Full Changelog: v0.5.0...v0.6.0