fix: Return timestamp as bigint from #decodeLogEvent (fixes #226). (#227)

Author: zzxthehappiest

src/services/decoders/JsonlDecoder/index.ts

@@ -247,7 +247,7 @@ class JsonlDecoder implements Decoder {
 
         return [
             message,
-            timestamp,
+            BigInt(timestamp),
             logLevel,
             logEventIdx + 1,
         ];