(rank) Reduce the impact of domain rank bonus, and only apply it to cancel out negative penalties, never to increase the ranking

code/functions/search-query/api/java/nu/marginalia/api/searchquery/model/results/ResultRankingParameters.java

@@ -69,7 +69,7 @@ public class ResultRankingParameters {
                 .bm25Params(new Bm25Parameters(1.2, 0.5))
                 .shortDocumentThreshold(2000)
                 .shortDocumentPenalty(2.)
-                .domainRankBonus(1 / 25.)
+                .domainRankBonus(1 / 100.)
                 .qualityPenalty(1 / 15.)
                 .shortSentenceThreshold(2)
                 .shortSentencePenalty(5)

code/index/java/nu/marginalia/index/results/IndexResultScoreCalculator.java

@@ -129,9 +129,9 @@ public class IndexResultScoreCalculator {
         double score = normalize(
                 score_firstPosition + score_proximity + score_verbatim
                         + score_bM25
-                        + score_bFlags
-                        + Math.max(0, documentBonus),
-                -Math.min(0, documentBonus));
+                        + score_bFlags,
+                -Math.min(0, documentBonus) // The magnitude of documentBonus, if it is negative; otherwise 0
+        );
 
         if (Double.isNaN(score)) { // This should never happen but if it does, we want to know about it
             if (getClass().desiredAssertionStatus()) {