Digital Freight Brokerage Market Size, Share, and Industry Analysis, By Service Type (Full-Truckload Brokerage, Less-Than-Truckload Brokerage, Intermodal Brokerage, Expedited Freight, Refrigerated Freight, Cross-Border Freight Brokerage, and Others), By Mode of Transportation (Road Freight, Rail Freight, Air Freight, and Ocean Freight), By Business Model (Business-to-Business and Business-to-Consumer), By End-User (Retail & E-commerce, Manufacturing, Automotive, Petrochemicals, and Others), and Regional Forecast, 2026-2034