Add debug logging to repo writes. (#1803)

Author: vlbee

liveactivities/src/main/scala/com/gu/liveactivities/service/LiveActivityChannelRepository.scala

@@ -114,7 +114,13 @@ class LiveActivityChannelRepository(client: DynamoDbAsyncClient, tableName: Stri
         }
 
         result.flatMap {
-          case Right(_) => Future.successful(())
+          case Right(_) =>
+            logger.info(
+              s"Updated live activity DB mapping id $id with updates: ${
+                ups.map(exp => s"${exp.attributes.names} = ${exp.attributes.values}").toString()
+              }"
+            )
+            Future.successful(())
           case Left(ex) =>
             val errorMsg = s"Error updating live activity mapping for id $id - ${DynamoReadError.describe(ex)}"
             logger.error(errorMsg)