Global Flameless Ration Heater Market Size, Share Demand Report By Product Type (Single-use FRHs, Reusable FRHs), By Heating Mechanism (Magnesium-based, Calcium Oxide-based, Other Chemical-based), By Packaging & Integration (Standalone, Integrated with MREs), By Application (Military & Defense, Emergency Relief, Outdoor Recreation, Commercial/Institutional), By Distribution Channel (Direct Procurement, Retail, E-commerce), By End-User (Government, NGOs, Retail Consumers, Commercial Buyers), By Region & Segment Forecasts, 2025–2030