Join: a look at a done build key logs no "kept" narration

After the join the builder looks at a done key again whenever a first view is answered late or a package's name is
heard (lead's i), and each look's "version kept" narration was written to the build log after the build's end, with no
start or end around it. A look at a done key builds nothing: a kept version says nothing new there and stays in the
process log only. TestBuilderMakesADoneKeyWithTheDigests failed at about one run in three (kept narrations of
tools-go and tools-typescript after the end); 8 of 8 pass.

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

modules/mesh-delivery-builder/internal/build/numbers.go

@@ -83,7 +83,9 @@ func (b *Builder) number(ctx context.Context, module string, m delivery.Module,
 	for _, s := range got.Said {
 		b.logf("%s at %s: %s", module, m.FP2, s.Line)
 		// And in the build log (design 51 *The versions*: it says a version was kept, and why), between the build's start and end.
-		if b.Log != nil {
+		// A look at a key already done builds nothing and has no start or end: a version kept there says nothing new, and is
+		// not logged (each later look, a first view answered or a name heard, would add one).
+		if b.Log != nil && !(done != nil && s.Why == versions.SaidKept) {
 			b.Log(delivery.BuildLogEntry{Event: delivery.BuildSaidEvent, Module: module, FP: m.FP2, Commit: m.Commit, Node: b.Node,
 				At: time.Now().UTC(), Line: s.Line, Why: s.Why})
 		}