Take no dry run in: mark it on the request, echo it on the outcome, set it aside

A dry run of an unreviewed branch was heard by the daemon like any build, registered, and its
definition reached a machine (novox/hq issue 240). The mark now travels with the build and the
daemon records, registers and plans nothing for it.

cmd/mesh-controller/main.go

@@ -253,6 +253,13 @@ func parseAround(set *flag.FlagSet, args []string) ([]string, error) {
 // registered, the same as the waiting command does. Said either way, so the daemon's log tells what
 // became of a build nobody was watching.
 func (b builds) Built(ctx context.Context, result link.BuildResult) error {
+	// **A dry run is looked at, never taken in** (novox/hq issue 240). On 2026-10-04 a dry run of an
+	// unmerged branch was heard here like any build, registered, and its definition reached a machine
+	// before anyone had reviewed it.
+	if result.DryRun {
+		fmt.Printf("%s: a dry run of %s on %s, not taken in\n", result.ID, result.Repository, result.Ref)
+		return nil
+	}
 	manifest, _, err := takeIn(ctx, b.inv, result)
 	// When it was asked, so a plan takes as its outcome only a build asked for it or after it
 	// (novox/hq 04-ISSUES/219). Zero when the id does not say.