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/genesis-single.test.ts

@@ -83,6 +83,7 @@ before(async () => {
       sourceRef,
       // Phase two builds from the same forge; the repositories sit beside the control plane's.
       toolsSource: source.replace(/[^/]+\.git$/, "mesh-tools.git"),
+      sdkSource: source.replace(/[^/]+\.git$/, "mesh-sdk.git"),
       catalogSource: source.replace(/[^/]+\.git$/, "mesh-catalog.git"),
       log: (m) => console.log(m),
     });