fix(Sonar): clean some Sonar issues

Author: sixdouglas

api/src/main/java/io/kafbat/ui/service/audit/AuditRecord.java

@@ -53,14 +53,12 @@ static OperationResult successful() {
     }
 
     static OperationResult error(Throwable th) {
-      OperationError err = OperationError.UNRECOGNIZED_ERROR;
-      switch (th) {
-        case AccessDeniedException ignored -> err = OperationError.ACCESS_DENIED;
-        case ValidationException ignored -> err = OperationError.VALIDATION_ERROR;
-        case CustomBaseException ignored -> err = OperationError.EXECUTION_ERROR;
-        case null, default -> {
-        }
-      }
+      OperationError err = switch (th) {
+        case AccessDeniedException ignored -> OperationError.ACCESS_DENIED;
+        case ValidationException ignored -> OperationError.VALIDATION_ERROR;
+        case CustomBaseException ignored -> OperationError.EXECUTION_ERROR;
+        case null, default -> OperationError.UNRECOGNIZED_ERROR;
+      };
       return new OperationResult(false, err);
     }
 

api/src/main/java/io/kafbat/ui/util/jsonschema/AvroJsonSchemaConverter.java

@@ -157,8 +157,7 @@ private JsonType convertType(Schema schema) {
       case ARRAY -> new SimpleJsonType(JsonType.Type.ARRAY);
       case FIXED, FLOAT, DOUBLE -> new SimpleJsonType(JsonType.Type.NUMBER);
       case BOOLEAN -> new SimpleJsonType(JsonType.Type.BOOLEAN);
-      //case BYTES, STRING -> new SimpleJsonType(JsonType.Type.STRING);
-      default -> new SimpleJsonType(JsonType.Type.STRING);
+      default -> new SimpleJsonType(JsonType.Type.STRING); // BYTES, STRING and the remaining possibilities
     };
   }
 }