Every test passes the typecheck gate

tsconfig.test.json existed precisely so a test that does not compile cannot silently be a
test that never ran — and four beds did not compile: two returned strings from test bodies,
two predate GenesisOptions gaining sdkSource, one passed a nullable host binary. All clean;
the gate is now part of launching any bed.

https://claude.ai/code/session_01D6qtiYU3P9jk3pnAXyAFyx

test/integration/one-node-mesh.test.ts

@@ -498,7 +498,7 @@ before(async () => {
         site: "hosting",
         // Supervise the host as a service so it survives the reboot check (E2).
         hostService: true,
-        hostBinary: binary,
+        ...(binary ? { hostBinary: binary } : {}),
         log: (m) => console.log(m),
       });
     } catch (err) {