fix: resolve lint issue in Watson embedding name test

- Change type comparison from == to 'is' to satisfy Ruff E721 rule
- All lint checks now pass locally

Co-Authored-By: João <joao@crewai.com>

tests/rag/embeddings/test_watson_embedding_name.py

@@ -1,9 +1,11 @@
 """Tests for Watson embedding function name method."""
 
-import pytest
-from unittest.mock import patch, MagicMock
 
-from crewai.rag.embeddings.providers.ibm.embedding_callable import WatsonEmbeddingFunction
+import pytest
+
+from crewai.rag.embeddings.providers.ibm.embedding_callable import (
+    WatsonEmbeddingFunction,
+)
 
 
 class TestWatsonEmbeddingName:
@@ -12,7 +14,7 @@ class TestWatsonEmbeddingName:
     def test_watson_embedding_function_has_name_method(self):
         """Test that WatsonEmbeddingFunction has a name method."""
         assert hasattr(WatsonEmbeddingFunction, 'name')
-        assert callable(getattr(WatsonEmbeddingFunction, 'name'))
+        assert callable(WatsonEmbeddingFunction.name)
 
     def test_watson_embedding_function_name_returns_watson(self):
         """Test that the name method returns 'watson'."""
@@ -44,13 +46,13 @@ class TestWatsonEmbeddingName:
         """Test that the name method has the correct signature."""
         import inspect
 
-        name_method = getattr(WatsonEmbeddingFunction, 'name')
+        name_method = WatsonEmbeddingFunction.name
 
         assert isinstance(inspect.getattr_static(WatsonEmbeddingFunction, 'name'), staticmethod)
 
         sig = inspect.signature(name_method)
         if sig.return_annotation != inspect.Signature.empty:
-            assert sig.return_annotation == str
+            assert sig.return_annotation is str
 
     def test_watson_embedding_function_reproduces_original_issue(self):
         """Test that reproduces the original issue scenario from #3597."""