[tracking] Conformance testing

[lmolkova]

Package	Status	Notes	Tracking
openai	partial	inference + tool_calling pass; embedding skipped; no streaming / Responses / structured-outputs scenarios	#38
anthropic	partial	inference + tool_calling scenarios exist but both pytest.mark.skip'd for legacy gen_ai.system; tool_calling is single-turn	#39, #40
langchain	partial	inference + agent + workflow all pass; no tool-calling-outside-agent, streaming, or embeddings scenarios; only OpenAI provider exercised
openai-agents	in-progress #85	empty conformance/ dir, no test_conformance.py, no tox factor; instrumentation has known semconv violations	#86
claude-agent-sdk	none	no conformance scaffold
google-genai	none	no conformance scaffold
weaviate-client	none	no conformance scaffold; semconv for vector-DB ops still upstream