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/kinded_test.go

@@ -0,0 +1,25 @@
+package resolution
+
+import (
+	"testing"
+
+	mcat "git.novox.be/novox/mesh-sdk/go/catalogue"
+)
+
+func aChannel(module, kind string) mcat.Manifest {
+	return mcat.Manifest{Module: module, Claims: []mcat.Claim{
+		{Name: "channel", Scope: mcat.ScopeMesh, Kind: kind}, {Name: "intake", Scope: mcat.ScopeMesh, Kind: kind}}}
+}
+
+// Two kinds on one machine are two holders, and one kind on two machines is a second claimant.
+func TestEachKindIsItsOwnHolderWhenResolved(t *testing.T) {
+	modules := []mcat.Manifest{aChannel("telegram", "telegram"), aChannel("desk-channel", "desktop")}
+	held, problems := checkClaims(modules, mcat.Node{Name: "anchor"}, nil, nil)
+	if len(problems) > 0 || len(held) != 4 {
+		t.Fatalf("two kinds on one machine: held %v, problems %v", held, problems)
+	}
+	_, problems = checkClaims([]mcat.Manifest{aChannel("telegram", "telegram")}, mcat.Node{Name: "home"}, held, nil)
+	if len(problems) == 0 {
+		t.Fatal("one kind held on two machines was not refused")
+	}
+}