**Concisely describe the proposed feature** I would like to add an flusher plugin to flush trace data to [langfuse](https://langfuse.com/docs) **Describe the solution you'd like (if any)** langfuse supports both [OTLP](https://langfuse.com/docs/opentelemetry/get-started) and [ingestion](https://api.reference.langfuse.com/#tag/ingestion/POST/api/public/ingestion) APIs
