feat(langchain): Record run_name as gen_ai.function_id on Invoke Agent Spans (#5926)

Set `run_name` as the `gen_ai.function_id` attribute instead of `gen_ai.agent.name`.

Add tests for `AgentExecutor.invoke()` based on the existing `AgentExecutor.stream()` test. Add tests that use `create_openai_tools_agent().with_config()` to test all branches for extracting the `run_name` LangChain attribute.

Author: alexander-alderman-webb

sentry_sdk/integrations/langchain.py

@@ -975,7 +975,7 @@ def new_invoke(self: "Any", *args: "Any", **kwargs: "Any") -> "Any":
             origin=LangchainIntegration.origin,
         ) as span:
             if run_name:
-                span.set_data(SPANDATA.GEN_AI_AGENT_NAME, run_name)
+                span.set_data(SPANDATA.GEN_AI_FUNCTION_ID, run_name)
 
             span.set_data(SPANDATA.GEN_AI_OPERATION_NAME, "invoke_agent")
             span.set_data(SPANDATA.GEN_AI_RESPONSE_STREAMING, False)
@@ -1035,7 +1035,7 @@ def new_stream(self: "Any", *args: "Any", **kwargs: "Any") -> "Any":
         span.__enter__()
 
         if run_name:
-            span.set_data(SPANDATA.GEN_AI_AGENT_NAME, run_name)
+            span.set_data(SPANDATA.GEN_AI_FUNCTION_ID, run_name)
 
         span.set_data(SPANDATA.GEN_AI_OPERATION_NAME, "invoke_agent")
         span.set_data(SPANDATA.GEN_AI_RESPONSE_STREAMING, True)