Judge every manifest against the list of predefined keys of its tree, and carry the list from a build

Mesh and node config may hold values only for keys on a fixed, reviewed list (hq ADR 0348 clause 7, design 57 package K2, issue 661). A build reads predefined.json at the root of the repository at the commit it builds and carries it with the commit's generation; module check and the merge gate read it from the tree. (Part 1 of 2: the changes to existing files.)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

cmd/mesh-builder/main.go

@@ -418,6 +418,11 @@ func answer(ctx context.Context, publisher builder.Publisher, on, workspace stri
 			for _, s := range built.Sources {
 				result.Sources = append(result.Sources, link.BuildSource{Repository: s.Repository, Ref: s.Ref, Paths: s.Paths})
 			}
+			// The list of predefined keys the manifest was judged against, for the controller to publish
+			// (novox/hq ADR 0348 §7).
+			if p := built.Predefined; p != nil {
+				result.Predefined = &link.PredefinedList{Keys: p.Keys, Generation: p.Generation}
+			}
 			say("built", built.Manifest.Module+" from "+short(built.Commit))
 		}
 	}