fix(parser): use max of both attribute counts in similarity scoring denominator

Candidates with fewer attributes than the original got inflated scores because the denominator counted candidate attributes only, while the extra-attributes penalty direction worked as intended. Using `max()` on both counts fixes the inflation while keeping the penalty.

Closes #322

scrapling/parser.py

@@ -991,7 +991,9 @@ class Selector(SelectorsGeneration):
                 SequenceMatcher(None, v, candidate_attributes.get(k, "")).ratio()
                 for k, v in original_attributes.items()
             )
-            checks += len(candidate_attributes)
+            # Using `max` so candidates with extra attributes are penalized and candidates
+            # with fewer attributes don't get inflated scores from a smaller denominator
+            checks += max(len(original_attributes), len(candidate_attributes))
         else:
             if not candidate_attributes:
                 # Both don't have attributes, this must mean something