Merge with positive scoring

WIP
I removed this filter in the komoot branch, it was notable time consuming, in particular if you search for very popular terms. Also, alphanumeric housenumber like 25c did not work with this filter. as a tokenizer was splitting it into [`25`, `c`] there was not match any more. do you know how to fix it? maybe we don't need it at all, i haven't found a situation where it caused problems. however, in terms of logic, this filter is valid.

maybe