[MM-59361] custom groups & read only channels (#28892)

* added group mention, read only view and post event tracking

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

server/platform/services/telemetry/telemetry.go

@@ -102,7 +102,18 @@ const (
 
 type TrackFeature string
 
-const TrackGuestFeature TrackFeature = "guest_accounts"
+const (
+	TrackGuestFeature    TrackFeature = "guest_accounts"
+	TrackGroupsFeature   TrackFeature = "custom_groups"
+	TrackReadOnlyFeature TrackFeature = "read_only_channels"
+)
+
+const (
+	TrackPropertyUser       = "user_actual_id"
+	TrackPropertyGroup      = "group_id"
+	TrackPropertyChannel    = "channel_id"
+	TrackPropertyPostAuthor = "post_owner_id"
+)
 
 type ServerIface interface {
 	Config() *model.Config
@@ -136,7 +147,9 @@ type EventFeature struct {
 }
 
 var featureSKUS = map[TrackFeature][]TrackSKU{
-	TrackGuestFeature: {TrackProfessionalSKU, TrackEnterpriseSKU},
+	TrackGuestFeature:    {TrackProfessionalSKU, TrackEnterpriseSKU},
+	TrackGroupsFeature:   {TrackProfessionalSKU, TrackEnterpriseSKU},
+	TrackReadOnlyFeature: {TrackProfessionalSKU, TrackEnterpriseSKU},
 }
 
 func New(srv ServerIface, dbStore store.Store, searchEngine *searchengine.Broker, log *mlog.Logger, verbose bool) (*TelemetryService, error) {