LLM Engineering in Practice (8): End-to-End Tracing with OTel + Langfuse

大模型工程化实战（八）：OTel + LangFuse 全链路 Trace——把网关、护栏、SchemaGate 全部打点串起来，出问题一眼定位到环节

A public trend signal observed across 1 source.