Sustainable Food Market Size, Share & Industry Analysis, By Product Category (Sustainably Produced Conventional Foods, Organic Foods, Sustainably Sourced Seafood, Plant-Based & Alternative Proteins, and Upcycled & Circular Economy Foods), By Distribution Channel (Retail (Supermarkets, Hypermarkets, Specialty), Foodservice (HORECA, Institutional), Online/DTC, and B2B/Industrial (Ingredients, Private Label Supply)), By Certification Type (Third-Party Certified, Company-Verified/Self-Declared, and Non-Certified Sustainable Practices), and Regional Forecast, 2026-2034