Take the catalogue's composition rules into the node-engine

ADR 0593 §7: the composer with its refusals leaves mesh-sdk, so mesh-sdk
carries no composition rule. The catalogue functions only the
node-engine's composition reaches (Resolve, Resolution's Compose,
Declaration, DataItems, LeftOut, Rules and the rest, the settings,
placeholder and template refusals, the rendering helpers) are copied
with their tests into internal/compose/resolution; a method of a
mesh-sdk shape becomes a function taking it first. The composition
calls its own copies, and the captured catalogue its tests read lives
here now, shared by mesh-compose's tests.

Claude-Session: https://claude.ai/code/session_01NcbgfJ9Gum47zkFKWRaovL

internal/compose/resolution/core_credentials_test.go

@@ -0,0 +1,24 @@
+package resolution
+
+import (
+	"reflect"
+	"testing"
+
+	mcat "git.novox.be/novox/mesh-sdk/go/catalogue"
+)
+
+func TestTheCoresOwnCredentialsAreTheBusTheProvisionerAndItsClient(t *testing.T) {
+	if want := []string{"mesh-provisioner", "mesh-provisioner-client", "nats"}; !reflect.DeepEqual(mcat.CoreCredentialModules, want) {
+		t.Fatalf("the core's modules are %v, want %v (mesh-vault's CoreModules is the same list)", mcat.CoreCredentialModules, want)
+	}
+	for _, m := range []string{"nats", "mesh-provisioner", "mesh-provisioner-client"} {
+		if !CarriesVaultSealed(m) {
+			t.Errorf("%s is not on the list", m)
+		}
+	}
+	for _, m := range []string{"postgres", "mesh-vault", "mesh-controller", ""} {
+		if CarriesVaultSealed(m) {
+			t.Errorf("%s is on the list", m)
+		}
+	}
+}