fix: remove OpenInference external span provider registration

Stop registering OpenInference as the external span provider in the
langchain runtime factory. The agent runtime (uipath-agents-python)
registers its own provider via SpanHierarchyManager, which returns the
correct LLMOps span. Having OpenInference also registered caused trace
ID mismatches on alpha where the OTEL context didn't propagate through
LangGraph's async tasks.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Clement Fauchere

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "uipath-langchain"
-version = "0.9.20"
+version = "0.9.21"
 description = "Python SDK that enables developers to build and deploy LangGraph agents to the UiPath Cloud Platform"
 readme = { file = "README.md", content-type = "text/markdown" }
 requires-python = ">=3.11"

src/uipath_langchain/runtime/factory.py

@@ -59,8 +59,11 @@ def _setup_instrumentation(self, trace_manager: UiPathTraceManager | None) -> No
         """Setup tracing and instrumentation."""
         _instrument_traceable_attributes()
         LangChainInstrumentor().instrument()
-        UiPathSpanUtils.register_current_span_provider(get_current_span)
-        UiPathSpanUtils.register_current_span_ancestors_provider(get_ancestor_spans)
+        # Don't register OpenInference as external span provider — let OTEL
+        # context from the agent runtime flow through naturally. This ensures
+        # @traced and _inject_trace_context see the agent's trace ID.
+        # UiPathSpanUtils.register_current_span_provider(get_current_span)
+        # UiPathSpanUtils.register_current_span_ancestors_provider(get_ancestor_spans)
 
     def _get_connection_string(self) -> str:
         """Get the database connection string."""