Fix: lint errors and update Field alias in models.py and AutoSelectio…

…nScorer initialization (#22846)

This PR addresses several lint errors in the core package of LangChain.
Specifically, the following issues were fixed:

1.Unexpected keyword argument "required" for "Field"  [call-arg]
2.tests/integration_tests/chains/test_cpal.py:263: error: Unexpected
keyword argument "narrative_input" for "QueryModel" [call-arg]

libs/experimental/langchain_experimental/cpal/models.py

@@ -135,9 +135,9 @@ class ResultModel(BaseModel):
 class StoryModel(BaseModel):
     """Story data."""
 
-    causal_operations: Any = Field(required=True)
-    intervention: Any = Field(required=True)
-    query: Any = Field(required=True)
+    causal_operations: Any = Field()
+    intervention: Any = Field()
+    query: Any = Field()
     _outcome_table: Any = PrivateAttr(default=None)
     _networkx_wrapper: Any = PrivateAttr(default=None)
 

libs/experimental/tests/integration_tests/chains/test_cpal.py

@@ -261,7 +261,7 @@ def test_query_chain(self) -> None:
         expected_output = {
             "chain_answer": None,
             "chain_data": QueryModel(
-                narrative_input="how many pets does jan have? ",
+                question="how many pets does jan have? ",
                 llm_error_msg="",
                 expression="SELECT name, value FROM df WHERE name = 'jan'",
             ),