Adds 4 integration tests for permission operations: - Test 9: SetPermission assigns permission and GetPermissions retrieves it - Test 10: Multiple SetPermission calls accumulate permissions - Test 11: SetPermissions assigns complete permission set - Test 12: SetPermission assigns to multiple user groups at once 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>