Task Management System (CRUD + Priority Ordering + User Quota + History Query)

Problem: Task Management System (CRUD + Priority Ordering + User Quota + History Query) Implement an in-memory task management system, progressively adding features by levels. You may use any programming language. Level 1: Basic CRUD Support basic operations on tasks: Create a task Read/query a task Update a task Delete a task Each task should include at least: task_id (unique identifier) created_at (creation timestamp or monotonic creation sequence) priority Level 2: Sort by priority and creation order When returning a list of tasks (or query results), support ordering: Sort primarily by priority Break ties by creation order/time Level 3: User quota and task assignment Introduce users and quotas: Allow assigning a task to a user Each user has a quota (e.g., max N assigned tasks) If the quota would be exceeded, the assignment must fail / be rejected Level 4: History queries Add history query capabilities, e.g.: Query the change history of a task (create/update/assign/delete) Or query the historical state of a task/task list at a given time/version Note: The original post does not specify exact I/O format, field details, or the precise quota/history semantics. Define reasonable APIs/data structures and ensure your implementation demonstrates each level’s requirements. Example Input N/A Output N/A