Filter by creation date. Accepts an array with one or two ISO 8601 date-time values. If one value is provided, it represents the start (left) boundary. If two values are provided, they define a date range (start and end). Examples: ["2025-05-01T00:00:00Z"] — filter from May 1, 2025 onward. ["2025-05-01T00:00:00Z", "2025-05-02T00:00:00Z"] — filter between May 1 and May 2, 2025.