{"service":"Strata Immersive Voice Engine","docs":"POST /v1/speak {text, emotion?, persona?, infer?} or /v1/tts {text, speed?, exaggeration?} with Authorization: Bearer <key>","routes":["GET /health","POST /v1/tts","POST /v1/speak"],"emotions":["warm_happy","playful","engaged_attentive","calm_present","tender","empathetic_soft","concerned_present","serious","late_night","neutral"],"personas":["atlas","companion","narrator","neutral"]}