Deletes a task by its Task ID, enforcing the same business rules as the Avaza web app.

Deletes the task and its entire subtask tree along with related data (assignments, followers, tags, dependencies, comments, and recurring-task links). Task file attachments are flagged for asynchronous removal from storage. Deletion is blocked (409) when the task or any of its subtasks has linked timesheets, invoiced fixed amounts, expenses, or schedule bookings.

Example request: DELETE /api/Task/3003344 Example response (200): { "taskID": 3003344, "isDeleted": true }