Sets the Custom Profile Attributes feature flag to true by default (#31160)

Co-authored-by: Miguel de la Cruz <miguel@ctrlz.es>

server/public/model/feature_flags.go

@@ -82,7 +82,7 @@ func (f *FeatureFlags) SetDefaults() {
 	f.WebSocketEventScope = true
 	f.NotificationMonitoring = true
 	f.ExperimentalAuditSettingsSystemConsoleUI = false
-	f.CustomProfileAttributes = false
+	f.CustomProfileAttributes = true
 	f.AttributeBasedAccessControl = false
 }