v5.6.0

Changelog

• 0d11f97 release v5.6.0
• ccc0e30 Merge pull request #28 from Seibert-Data/setup-command-url-normalize
• 503049f polish setup command + skill per auditors (placeholder user, dedup install, scoped tools)
• 1dd7d77 add teamvault-cli:setup command + strip trailing slash from base URL