[Fix] Adjust merge distance for improved cluster accuracy in GridClusterer.java

Author: KOKEONHO

src/main/java/boombimapi/domain/place/cluster/impl/GridClusterer.java

@@ -97,7 +97,7 @@ private List<ClusterResult> mergeNeighbors(
 
         DisjointSet disjointSet = new DisjointSet(n);
 
-        double mergeDistance = cellSizePixel;
+        double mergeDistance = cellSizePixel * 0.95;
 
         for (int i = 0; i < n; i++) {
             Cell cell = cells.get(i);