Get current positions across all or filtered perpetual connectors.

This endpoint fetches real-time position data directly from the connectors, including unrealized PnL, leverage, funding fees, and margin information.

Args: filter_request: JSON payload with filtering criteria

Returns: Paginated response with position data and pagination metadata

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

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