MM-18522: Include edited posts in compliance export. (#12197)

* MM-18522: Export all post edits in compliance exports.

* MM-18522: Changes ordering of export query post results.

model/message_export.go

@@ -20,6 +20,7 @@ type MessageExport struct {
 
 	PostId         *string
 	PostCreateAt   *int64
+	PostUpdateAt   *int64
 	PostMessage    *string
 	PostType       *string
 	PostRootId     *string

store/sqlstore/compliance_store.go

@@ -212,6 +212,7 @@ func (s SqlComplianceStore) MessageExport(after int64, limit int) ([]*model.Mess
 		`SELECT
 			Posts.Id AS PostId,
 			Posts.CreateAt AS PostCreateAt,
+			Posts.UpdateAt AS PostUpdateAt,
 			Posts.Message AS PostMessage,
 			Posts.Type AS PostType,
 			Posts.OriginalId AS PostOriginalId,
@@ -240,9 +241,9 @@ func (s SqlComplianceStore) MessageExport(after int64, limit int) ([]*model.Mess
 		LEFT OUTER JOIN Users ON Posts.UserId = Users.Id
 		LEFT JOIN Bots ON Bots.UserId = Posts.UserId
 		WHERE
-			Posts.CreateAt > :StartTime AND
+			(Posts.CreateAt > :StartTime OR Posts.EditAt > :StartTime) AND
 			Posts.Type = ''
-		ORDER BY PostCreateAt
+		ORDER BY PostUpdateAt
 		LIMIT :Limit`
 
 	var cposts []*model.MessageExport