fix lint and add _BaseAgent to sphinx nitpick exceptions

Author: etserend

docs/nitpick-exceptions.ini

@@ -47,6 +47,7 @@ py-class=
     fastapi.applications.FastAPI
     starlette.applications.Starlette
     _contextvars.Token
+    opentelemetry.util.genai.types._BaseAgent
 
 any=
     ; API

util/opentelemetry-util-genai/tests/test_handler_agent.py

@@ -104,8 +104,8 @@ def test_create_agent_context_manager(self) -> None:
             name="CM Agent",
             provider="openai",
         )
-        with handler.create_agent(creation) as c:
-            c.agent_id = "assigned-id"
+        with handler.create_agent(creation) as cr:
+            cr.agent_id = "assigned-id"
 
         spans = self.span_exporter.get_finished_spans()
         self.assertEqual(len(spans), 1)
@@ -123,9 +123,9 @@ def test_create_agent_context_manager_error(self) -> None:
 
     def test_create_agent_context_manager_default(self) -> None:
         handler = self._make_handler()
-        with handler.create_agent() as c:
-            c.name = "Dynamic Agent"
-            c.provider = "openai"
+        with handler.create_agent() as cr:
+            cr.name = "Dynamic Agent"
+            cr.provider = "openai"
 
         spans = self.span_exporter.get_finished_spans()
         self.assertEqual(len(spans), 1)