Add comment stating msgIndex is an experimental feature

node/config/doc_gen.go

@@ -473,7 +473,8 @@ Set to 0 to keep all mappings`,
 			Name: "EnableMsgIndex",
 			Type: "bool",
 
-			Comment: `EnableMsgIndex enables indexing of messages on chain.`,
+			Comment: `EXPERIMENTAL FEATURE. USE WITH CAUTION
+EnableMsgIndex enables indexing of messages on chain.`,
 		},
 	},
 	"IndexProviderConfig": []DocField{

node/config/types.go

@@ -728,6 +728,7 @@ type Events struct {
 }
 
 type IndexConfig struct {
+	// EXPERIMENTAL FEATURE. USE WITH CAUTION
 	// EnableMsgIndex enables indexing of messages on chain.
 	EnableMsgIndex bool
 }