Align backend plan with codebase

app/api/health/route.ts

@@ -0,0 +1,22 @@
+import { NextResponse } from "next/server";
+import { prisma } from "../../../lib/server/db";
+import { isDatabaseConfigured } from "../../../lib/server/env";
+
+export async function GET() {
+  if (!isDatabaseConfigured()) {
+    return NextResponse.json({
+      ok: true,
+      database: "not_configured",
+    });
+  }
+
+  try {
+    await prisma.$queryRaw`SELECT 1`;
+    return NextResponse.json({ ok: true, database: "connected" });
+  } catch {
+    return NextResponse.json(
+      { ok: false, database: "error" },
+      { status: 503 },
+    );
+  }
+}