Get active (in-flight) orders across all or filtered accounts and connectors.

This endpoint fetches real-time active orders directly from the connectors' in_flight_orders property, providing current order status, fill amounts, and other live order data.

Args: filter_request: JSON payload with filtering criteria

Returns: Paginated response with active order data and pagination metadata

Raises: HTTPException: 500 if there's an error fetching orders

{
  "data": [],
  "pagination": {
    "has_more": true,
    "limit": 100,
    "next_cursor": "2024-01-10T12:00:00",
    "total_count": 500
  }
}