Fix: preserve field names and omit insignificant whitespace in JSON output (#48)

Author: regadas

plugin/src/main/java/dev/regadas/trino/pubsub/listener/Encoder.java

@@ -30,7 +30,8 @@ public static Encoding fromOrDefault(String encoding, Encoding defaultEncoding)
 
     @FunctionalInterface
     interface MessageEncoder extends Encoder<Message> {
-        JsonFormat.Printer JSON_PRINTER = JsonFormat.printer();
+        JsonFormat.Printer JSON_PRINTER =
+                JsonFormat.printer().preservingProtoFieldNames().omittingInsignificantWhitespace();
 
         static MessageEncoder create(Encoding encoding) {
             return switch (encoding) {