[MM-40917] - Inactive Server Email Notification (#19374)

* [MM-40917] - Inactive Server Email Notification

* add email template

* make store layers

* add some store tests

* fix translations

* fix logic

* improve

* fix lint

* feedback-impl

* fix wrong text

* optimize queries

* move feature flag check

* feedback impl-1

* add line

* feedback impl

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

store/retrylayer/retrylayer.go

@@ -6211,6 +6211,27 @@ func (s *RetryLayerPostStore) GetFlaggedPostsForTeam(userID string, teamID strin
 
 }
 
+func (s *RetryLayerPostStore) GetLastPostRowCreateAt() (int64, error) {
+
+	tries := 0
+	for {
+		result, err := s.PostStore.GetLastPostRowCreateAt()
+		if err == nil {
+			return result, nil
+		}
+		if !isRepeatableError(err) {
+			return result, err
+		}
+		tries++
+		if tries >= 3 {
+			err = errors.Wrap(err, "giving up after 3 consecutive repeatable transaction failures")
+			return result, err
+		}
+		timepkg.Sleep(100 * timepkg.Millisecond)
+	}
+
+}
+
 func (s *RetryLayerPostStore) GetMaxPostSize() int {
 
 	return s.PostStore.GetMaxPostSize()
@@ -8260,6 +8281,27 @@ func (s *RetryLayerSessionStore) Get(ctx context.Context, sessionIDOrToken strin
 
 }
 
+func (s *RetryLayerSessionStore) GetLastSessionRowCreateAt() (int64, error) {
+
+	tries := 0
+	for {
+		result, err := s.SessionStore.GetLastSessionRowCreateAt()
+		if err == nil {
+			return result, nil
+		}
+		if !isRepeatableError(err) {
+			return result, err
+		}
+		tries++
+		if tries >= 3 {
+			err = errors.Wrap(err, "giving up after 3 consecutive repeatable transaction failures")
+			return result, err
+		}
+		timepkg.Sleep(100 * timepkg.Millisecond)
+	}
+
+}
+
 func (s *RetryLayerSessionStore) GetSessions(userID string) ([]*model.Session, error) {
 
 	tries := 0