CAT-LAB1: the lab clones through the forge account, and holds no registry secret

npm-package-registry is form none, so the registry pair the lab's clones of
mesh-tools-go used is no longer minted. The lab requires forge-account as the
build modules do; its clones go over ssh through a git and ssh configuration the
mesh writes from that binding. The secret, contributes and MESH_LAB_FORGE_SECRET go.

Claude-Session: https://claude.ai/code/session_01JG73KJNrH5EgFXMKKYSrig

modules/lab/files/forge.gitconfig

@@ -0,0 +1,5 @@
+[url "ssh://${bound:forge-account:ssh_alias}/"]
+	insteadOf = ${bound:forge-account:https_base}
+	insteadOf = ${config:forge}/
+[core]
+	sshCommand = ssh -F ${dir:state}/forge.ssh