refactor(tests): enhance type safety and readability in policy test assertions

Author: dgarciasquare1

test/core/policy_test.dart

@@ -432,7 +432,10 @@ void main() {
         final policy = Policy.fromJson(json);
 
         expect(policy.metadata, equals(complexMetadata));
-        expect(policy.metadata['nested']!['array'], equals([1, 2, 3]));
+        expect(
+          (policy.metadata['nested'] as Map<String, dynamic>)['array'],
+          equals([1, 2, 3]),
+        );
       });
     });
 

test/utils/json_handler_test.dart

@@ -93,9 +93,9 @@ class TestPolicy {
           metadata.entries.every((entry) {
             final otherValue = other.metadata[entry.key];
             if (entry.value is List && otherValue is List) {
-              return entry.value.length == otherValue.length &&
-                  (entry.value as List)
-                      .every((item) => otherValue.contains(item));
+              final valueList = entry.value as List;
+              return valueList.length == otherValue.length &&
+                  valueList.every((item) => otherValue.contains(item));
             }
             return entry.value == otherValue;
           });