Global Electric Massager Market Size, Share & Demand Report By Product Type (Chair/Stationary, Handheld, Wearable, Foot & Neck, Full-Body Systems), By Technology (Vibration, Percussion, Heat & Infrared, Compression, AI-Enabled Smart), By Application (Pain Relief, Stress Management, Fitness Recovery, Rehabilitation, Wellness Therapy), By Distribution Channel, By End User, By Region & Segment Forecasts, 2025–2030