MM-33708 - Add MentionCountRoot column to ChannelMembers (#17099)

* added new column for root-only mentions

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

store/store.go

@@ -193,9 +193,9 @@ type ChannelStore interface {
 	PermanentDeleteMembersByUser(userId string) error
 	PermanentDeleteMembersByChannel(channelID string) error
 	UpdateLastViewedAt(channelIds []string, userId string, updateThreads bool) (map[string]int64, error)
-	UpdateLastViewedAtPost(unreadPost *model.Post, userID string, mentionCount int, updateThreads bool) (*model.ChannelUnreadAt, error)
+	UpdateLastViewedAtPost(unreadPost *model.Post, userID string, mentionCount, mentionCountRoot int, updateThreads bool) (*model.ChannelUnreadAt, error)
 	CountPostsAfter(channelID string, timestamp int64, userId string) (int, int, error)
-	IncrementMentionCount(channelID string, userId string, updateThreads bool) error
+	IncrementMentionCount(channelID string, userId string, updateThreads, isRoot bool) error
 	AnalyticsTypeCount(teamID string, channelType string) (int64, error)
 	GetMembersForUser(teamID string, userId string) (*model.ChannelMembers, error)
 	GetMembersForUserWithPagination(teamID, userId string, page, perPage int) (*model.ChannelMembers, error)
@@ -257,7 +257,6 @@ type ThreadStore interface {
 	GetThreadForUser(userId, teamId, threadId string, extended bool) (*model.ThreadResponse, error)
 	Delete(postId string) error
 	GetPosts(threadId string, since int64) ([]*model.Post, error)
-	GetThreadMentionsForUserPerChannel(userId, teamId string) (map[string]int64, error)
 
 	MarkAllAsRead(userId, teamID string) error
 	MarkAsRead(userId, threadID string, timestamp int64) error