{"message":"Valeria Worker API","endpoints":{"/health":"Health check endpoint (GET)","/user/profile":"Get user profile (GET, requires auth)","/google/ephemeral-token":"Create Google AI ephemeral token (POST, requires auth)","/tts":"Generate text-to-speech audio (POST, requires auth)","/tts/voices":"Get available TTS voices (GET)"},"authentication":{"method":"Firebase Authentication","header":"Authorization: Bearer <firebase_id_token>","note":"All endpoints except /, /health, and /tts/voices require authentication","verification":"Tokens are verified against Firebase Authentication service"}}