Report what an adopted node holds, its firewall and what is reachable, and speak unasked when that changes (hq ADR 0100)

internal/identity/identity_test.go

@@ -220,6 +220,19 @@ func TestTheWireFormatIsExactlyTheseFieldNames(t *testing.T) {
 	if len(fields) != 5 {
 		t.Errorf("the token has %d fields, expected 5: %v", len(fields), fields)
 	}
+
+	// novox/hq ADR 0100: an adopted node's token says so, and a converged one's is unchanged.
+	raw, err = json.Marshal(Token{Version: 1, Secret: "s", Adopted: true})
+	if err != nil {
+		t.Fatal(err)
+	}
+	fields = map[string]any{}
+	if err := json.Unmarshal(raw, &fields); err != nil {
+		t.Fatal(err)
+	}
+	if fields["adopted"] != true {
+		t.Errorf("an adopted token does not say \"adopted\": %v", fields)
+	}
 }
 
 func TestACompleteTokenParses(t *testing.T) {