Read stored manifests leniently and mark the defaults layer (hq ADR 0262 review)

A strict read of the stored catalogue fails every plan and send once a manifest uses a field an older
controller lacks; registration stays strict. A node named default lost its layer to the name check.
Judge the operator's keys by whole words, and scan a default under any key.

cmd/mesh-controller/modules.go

@@ -559,7 +559,7 @@ func describeEffective(module, where string, values []catalogue.SettingSource) s
 	for _, v := range values {
 		value, _ := json.Marshal(v.Value)
 		fmt.Fprintf(&b, "  %s = %s  (%s", v.Key, value, v.From)
-		if v.HasDefault && v.From != catalogue.DefaultLayer {
+		if v.HasDefault && !v.FromDefault {
 			d, _ := json.Marshal(v.Default)
 			fmt.Fprintf(&b, "; the default is %s", d)
 		}