Freight Brokerage Market Size, Share & Industry Analysis, By Mode of Transportation (Road Freight Brokerage, Rail Freight Brokerage, Ocean & Inland Waterway Freight Brokerage, and Air Freight Brokerage), By Brokerage Service Type (Spot Freight Brokerage, Contract Freight Brokerage, Intermodal/Multimodal Brokerage, and Managed Transportation Services), By Shipper Size (Large Enterprises, Mid-Sized Businesses, and Small & Medium Enterprises (SMEs)), By Industry Vertical (Retail & E-commerce, Manufacturing, Healthcare & Pharmaceuticals, Automotive, and Others) and Regional Forecast, 2026-2034