fix(desktop): register integration router in main trpc assembly

The HostRouter type declares an `integration` route, but the desktop
app's trpcRouter assembly did not serve it, tripping the
servesEveryHostRoute compile-time guard and failing typecheck.

Generated-By: PostHog Code
Task-Id: 9fd73e57-6627-4884-bb0e-953cc4fa6b33

Author: Gilbert09

apps/code/src/main/trpc/router.ts

@@ -26,6 +26,7 @@ import { gitRouter } from "@posthog/host-router/routers/git.router";
 import { githubIntegrationRouter } from "@posthog/host-router/routers/github-integration.router";
 import { githubReleasesRouter } from "@posthog/host-router/routers/github-releases.router";
 import { handoffRouter } from "@posthog/host-router/routers/handoff.router";
+import { integrationRouter } from "@posthog/host-router/routers/integration.router";
 import { linearIntegrationRouter } from "@posthog/host-router/routers/linear-integration.router";
 import { llmGatewayRouter } from "@posthog/host-router/routers/llm-gateway.router";
 import { localMcpRouter } from "@posthog/host-router/routers/local-mcp.router";
@@ -87,6 +88,7 @@ export const trpcRouter = router({
   githubIntegration: githubIntegrationRouter,
   githubReleases: githubReleasesRouter,
   handoff: handoffRouter,
+  integration: integrationRouter,
   linearIntegration: linearIntegrationRouter,
   llmGateway: llmGatewayRouter,
   localMcp: localMcpRouter,