Merge pull request 'The mint leaves the control plane's old-bus secret alone' (#101) from fix/mint-leaves-the-control-planes-old-secret-alone into main

cmd/mesh-controller/rollout.go

@@ -340,6 +340,14 @@ func rolloutMint(ctx context.Context, again bool) error {
 			machines++
 
 		case broker.KindModule:
+			if p.Module == "mesh-controller" {
+				// The control plane is a module too, and its `broker` secret is the old bus's
+				// credential it is still using while this runs. Writing the new bus's blob there
+				// cut the mesh off from its own old bus mid-move (2026-09-28). Its new-bus credential
+				// is the controller principal's `bus` secret above; nothing else is needed here.
+				skipped++
+				continue
+			}
 			m, inShelf := shelf[p.Module]
 			if !inShelf {
 				skipped++