Published an OpportunityMarksUpdated event when an opportunity's marks change over the API

internal/events/events.go

@@ -4,9 +4,17 @@
 // and their payloads.
 package events
 
-// OpportunitiesUpdated is published when a save stores new opportunities or
-// new releases of stored ones. Its payload is an OpportunitiesUpdatedPayload.
-const OpportunitiesUpdated = "OpportunitiesUpdated"
+// Event types: an Event's Type, which says what its Payload is.
+const (
+	// OpportunitiesUpdated is published when a save stores new
+	// opportunities or new releases of stored ones. Its payload is an
+	// OpportunitiesUpdatedPayload.
+	OpportunitiesUpdated = "OpportunitiesUpdated"
+	// OpportunityMarksUpdated is published when an opportunity's marks are
+	// changed over the API. Its payload is the opportunity's
+	// types.OpportunityMarks after the change, which include its UUID.
+	OpportunityMarksUpdated = "OpportunityMarksUpdated"
+)
 
 // ---------- OpportunitiesUpdated ----------