pipecat/changelog/4352.fixed.md

• Fixed AssemblyAISTTService, CartesiaSTTService, GradiumSTTService, and SonioxSTTService crashing the pipeline on transient WebSocket send failures. Each run_stt sent audio directly without catching errors, so a single network hiccup mid-stream raised an uncaught exception through process_frame. The guards now log a warning and let the connection-state check on the next call handle recovery, matching the pattern used by Deepgram, xAI, Azure, and other push-based STTs.