feat(api): set up Elysia server with health check on Next.js catch-all route

app/api/[[...slugs]]/route.ts

@@ -0,0 +1,15 @@
+import { Elysia } from "elysia"
+import { healthRoutes } from "@/lib/api/health"
+
+const app = new Elysia({ prefix: "/api" })
+  .use(healthRoutes)
+  .get("/", () => ({
+    name: "DeckyVault API",
+    version: "2026.0.1",
+  }))
+
+export const GET = app.fetch
+export const POST = app.fetch
+export const PUT = app.fetch
+export const DELETE = app.fetch
+export const PATCH = app.fetch