OpenInference Haystack Instrumentation

The `openinference-instrumentation-haystack` library provides OpenTelemetry-compliant instrumentation for Haystack (v2.x) pipelines, enabling detailed tracing of LLM operations, prompt engineering, and RAG workflows. It captures inputs, outputs, and metadata for each component within a Haystack pipeline, translating them into OpenInference semantic conventions. The current version is 0.1.30, and it is part of the broader OpenInference project, which sees frequent updates across its various instrumentation packages.