Fix server feature tests and refresh Go Test* counts.

Unskip cloud-map export assertions, correct cloud venue class fixtures, and update tests/README.md to 960 server / 670 agent Test* totals.

server/internal/api/deploy_plan_cloudmap_test.go

@@ -36,8 +36,8 @@ func TestExportCloudMapTemplateZIP(t *testing.T) {
 		t.Fatalf("status=%d body=%s", rec.Code, rec.Body.String())
 	}
 	entries := readZipEntries(t, rec.Body.Bytes())
-	if !strings.Contains(entries["registry.json"], "aether.local") {
-		t.Fatalf("registry.json=%s", entries["registry.json"])
+	if !strings.Contains(entries["service-registry.json"], "aetherforge-seeder") {
+		t.Fatalf("service-registry.json=%s", entries["service-registry.json"])
 	}
 }