fix: remove double NON_NULL wrapping on byPk argument types

docs/configuration.md

@@ -101,7 +101,7 @@ When no exposed schema has opted in, `__schema` and `__type` selections return a
 { "errors": [{ "message": "Unknown field \"__schema\" on type Query" }] }
 ```
 
-#### Partial introspection accross multiple schemas
+#### Partial introspection across multiple schemas
 
 !!!note "disable introspection for all schemas"
 

src/graphql.rs

@@ -1314,11 +1314,15 @@ impl ___Type for QueryType {
                             // Use graphql_column_field_name to convert snake_case to camelCase if needed
                             let arg_name = self.schema.graphql_column_field_name(col);
 
+                            // sql_column_to_graphql_type already wraps NOT NULL columns in NonNull.
+                            // For view columns (always nullable in PG), we must add it ourselves.
+                            let non_null_col_type = match col_type {
+                                __Type::NonNull(_) => col_type,
+                                t => __Type::NonNull(NonNullType { type_: Box::new(t) }),
+                            };
                             pk_args.push(__InputValue {
                                 name_: arg_name,
-                                type_: __Type::NonNull(NonNullType {
-                                    type_: Box::new(col_type),
-                                }),
+                                type_: non_null_col_type,
                                 description: Some(format!("The record's `{}` value", col_name)),
                                 default_value: None,
                                 sql_type: Some(NodeSQLType::Column(Arc::clone(col))),

test/expected/function_calls.out

@@ -2058,8 +2058,8 @@ begin;
                                      "kind": "NON_NULL",                                        +
                                      "name": null,                                              +
                                      "ofType": {                                                +
-                                         "kind": "NON_NULL",                                    +
-                                         "name": null                                           +
+                                         "kind": "SCALAR",                                      +
+                                         "name": "Int"                                          +
                                      }                                                          +
                                  }                                                              +
                              }                                                                  +