add default bounds for json fields

wizard-common/src/main/java/org/cobbzilla/wizard/model/SqlDefaultSearchField.java

@@ -97,7 +97,7 @@ public class SqlDefaultSearchField implements SearchField {
                 case error: case opaque_string:
                     bounds.addAll(asList(bindNonSortableString(name())));
                     break;
-                case string:
+                case string: case json: case json_array:
                     if (f.getName().equals(UUID)) {
                         bounds.addAll(asList(bindUuid(name())));
                     } else {

wizard-common/src/main/java/org/cobbzilla/wizard/model/search/SearchBoundComparison.java

@@ -72,7 +72,7 @@ public enum SearchBoundComparison {
         return splitAndTrim(val, "" + delim);
     }
 
-    private SearchBoundSqlFunction sqlFunction;
+    private final SearchBoundSqlFunction sqlFunction;
 
     private static Object parseLikeArgument(SearchBound bound, String val, String locale) { return sqlFilter(val); }