Freight Railcar Part Market Size & Forecasts 2026-2035, By Segments (End-User, Material, Application, Part Type), Growth Opportunities, Innovation Landscape, Regulatory Shifts, Strategic Regional Insights (U.S., Japan, China, South Korea, UK, Germany, France), and Competitive Dynamics (Amsted Rail, Wabtec Corporation, Progress Rail (Caterpillar), The Greenbrier Companies, Knorr-Bremse)