7c6ec97c62
- Add complete CRUD operations: CreateTask, GetTask, GetTasks, Save - Implement tag operations: AddTag, RemoveTag, GetTags - Add task lifecycle methods: Complete, Delete, StartTask, StopTask - Implement SQL type conversion helpers for nullable fields - Add comprehensive test suite with 9 passing tests - Fix timestamp handling (Created/Modified as Unix timestamps) - Implement soft delete (status change) and hard delete options