Provisioning `OtlpTracer` in Effect HTTP: Runtime Injection vs. Application Layer

const finalLayer = rpcLayer.pipe(
  Layer.provideMerge(servicesLayer),
  Layer.provideMerge(TracerLive), // or TracerTest
);

const httpApp = makeRouter.pipe(
  Effect.scoped,
  Effect.provide(finalLayer),
);

  beforeAll(() => {
    // Construct the real production handler but inject test config/db
    const handler = makeHandler((liveLayer) =>
      liveLayer.pipe(
        Layer.provide(env.testLayer),
        Layer.provideMerge(dbLayer.test),
        Layer.provide(TracerTest),
      )
    );

return HttpApp.toWebHandlerLayer(
  httpApp,
  TracerLive // or TracerTest
).handler;

  const finalLayer = Layer.merge(rpcLayer, Tracer*).pipe(
    Layer.provideMerge(servicesLayer),
  );