Add changelog and test json first event for timestamp

Author: mterhar

.chloggen/libhoney-full-response.yaml

@@ -0,0 +1,8 @@
+change_type: bug_fix
+component: libhoneyreceiver
+note: return full array of statuses per event
+issues: [42272]
+subtext:
+  Libhoney has a per-event-within-each-batch response code array for each batch received.
+  This has now been implemented for both initial parsing errors as well as downstream consumer errors.
+change_logs: [user]

receiver/libhoneyreceiver/receiver.go

@@ -271,8 +271,13 @@ func (r *libhoneyReceiver) handleEvent(resp http.ResponseWriter, req *http.Reque
 			writeLibhoneyError(resp, enc, "failed to unmarshal JSON")
 			return
 		}
+
 		if len(libhoneyevents) > 0 {
-			r.settings.Logger.Debug("Decoding with json worked", zap.Time("timestamp.first.msgpacktimestamp", *libhoneyevents[0].MsgPackTimestamp), zap.String("timestamp.first.time", libhoneyevents[0].Time))
+			if libhoneyevents[0].MsgPackTimestamp != nil {
+				r.settings.Logger.Debug("Decoding with json worked", zap.Time("timestamp.first.msgpacktimestamp", *libhoneyevents[0].MsgPackTimestamp), zap.String("timestamp.first.time", libhoneyevents[0].Time))
+			} else {
+				r.settings.Logger.Debug("Decoding with json worked", zap.String("timestamp.first.time", libhoneyevents[0].Time))
+			}
 		}
 	default:
 		r.settings.Logger.Info("unsupported content type", zap.String("content-type", req.Header.Get("Content-Type")))