Toward Experimentation-as-a-Service in 5G/6G: The Plaza6G Prototype for AI-Assisted Trials. - Sergio Barrachina-Muñoz; Marc Carrascosa-Zamacois; Horacio Bleda; Umair Riaz; Yasir Maqsood; Xavier Calle; Selva Vía; Miquel Payaró; Josep Mangues-Bafalluy (WONS, 2026)