Global Event Management as a Service (EMaaS) Market Size, Share & Demand Report By Service Type (Core Orchestration, Edge-Orchestration, Identity Mesh, Sponsor Analytics, Venue Integration), By Application (Corporate Events, Trade Shows, Education, Hybrid Delivery), By Deployment Model (Pure SaaS, SaaS + Managed Services, On-Demand Bundles), By End-User (Large Enterprises, SMEs, Government, Education) By Region & Segment Forecasts, 2025–2030