0.2.0

• Certificate restrictions in policy. Rules can now emit force_command (the target runs only this command) and source_address (a CIDR allowlist of where the certificate may be used). Both are baked into the certificate by the CA, so they apply on every target server without per-host AuthorizedPrincipalsFile options.
• Hardened validation. Key ID templates and certificate principals are now checked against a strict allowlist at policy load time (and again at issuance), rejecting newlines, control characters, and unbounded values that could be injected into sshd logs or the audit trail.
• Supply-chain hardening. CI gained govulncheck and a CodeQL workflow, releases emit SLSA build provenance, and vulnerable dependencies were bumped.
• Simpler Lambda support. The Lambda-specific code was removed; the binary now runs the ordinary serve HTTP server behind the AWS Lambda Web Adapter.