Just noticed that our SIP trunk endpoints return 503 Service Unavailable when JMeter pushes concurrent call volumes above 200 TPS. The POST /api/v2/telephony/providers/edges call succeeds initially, but subsequent WebSocket handshakes fail with 1006 Abnormal Closure. We are using Genesys Cloud v2023.11 and hitting the default rate limits despite setting X-Genesys-Client-Version. Is there a specific header or configuration to increase the concurrent session capacity for BYOC trunks?