meshcatalogclient: the holder's module name and the addresses of the states others read (modules, manifests), so a reader names them from the client (lead's request; issue 1966)

Claude-Session: https://claude.ai/code/session_01NcbgfFSnn24M3GcqttoU7i

contracts/go/clients/meshcatalogclient/catalog_test.go

@@ -35,6 +35,13 @@ func TestDigestAndFingerprintSetKeepTheirForms(t *testing.T) {
 }
 
 // A manifest and a module are read back as written, and each rule of the old values is kept: a refusal names its reason.
+// The holder's states others read keep the addresses the manifests' `reads` and the first views name today.
+func TestTheHoldersReadAddressesAreTheOnesTheManifestsName(t *testing.T) {
+	if Module != "mesh-delivery-indexer" || ModulesRead != "mesh-delivery-indexer.modules" || ManifestsRead != "mesh-delivery-indexer.manifests" {
+		t.Errorf("the holder %q reads %q and %q", Module, ModulesRead, ManifestsRead)
+	}
+}
+
 func TestManifestAndModuleValuesKeepTheirRules(t *testing.T) {
 	if _, err := ManifestsKey("abc"); err == nil || !strings.Contains(err.Error(), `"abc"`) {
 		t.Errorf("ManifestsKey(abc) = %v", err)

contracts/go/clients/meshcatalogclient/module.go

@@ -10,6 +10,15 @@ import (
 	"git.novox.be/novox/mesh-sdk/go/keys"
 )
 
+// Module is the module that holds the seat mesh-catalog, and the two states of its others read, by the address a
+// manifest's `reads` and a first view name them: the modules the trunk holds and their manifests. A reader names them here,
+// never by the holder's literal name.
+const (
+	Module        = "mesh-delivery-indexer"
+	ModulesRead   = Module + ".modules"
+	ManifestsRead = Module + ".manifests"
+)
+
 // RootPath is a `modules` value's path when the module's manifest is its repository's root.
 const RootPath = "."