Feishu Calendar API for creating, querying, updating, and managing schedules and calendar permissions.

• Full event lifecycle management: create, retrieve, update, delete, and search events with attendee support (users, chats, meeting rooms)
• Calendar administration including creation, sharing, ACL-based permissions (five role levels from free_busy_reader to owner), and subscription management
• Meeting room operations: list rooms, fetch details, and query availability windows
• Pagination support for large datasets and flexible user ID types (open_id, user_id, union_id)