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

testdata/beside/mesh-catalog/modules/sshd/files/10-mesh.conf

@@ -0,0 +1,10 @@
+# Managed by the mesh (module sshd). Replaced on every push; edit the catalogue instead.
+Port 22
+PermitRootLogin no
+PasswordAuthentication no
+PubkeyAuthentication yes
+KbdInteractiveAuthentication no
+UsePAM yes
+X11Forwarding no
+PrintMotd no
+AcceptEnv LANG LC_*