feat: establish NekoNest Cloud control and relay

app/api/internal/relay/authorize-device/route.ts

@@ -0,0 +1,23 @@
+import {
+  authenticateRelayNode,
+  authorizeDeviceForRelay,
+} from "@/db/relay-control-plane";
+import { apiError, readJsonMutation } from "../../../respond";
+
+export async function POST(request: Request) {
+  try {
+    const principal = await authenticateRelayNode(request);
+    const payload = await readJsonMutation<{
+      device_id?: string;
+      token_hash?: string;
+    }>(request);
+    const result = await authorizeDeviceForRelay({
+      principal,
+      deviceId: payload.device_id ?? "",
+      tokenHash: payload.token_hash?.trim().toLowerCase() ?? "",
+    });
+    return Response.json(result, { headers: { "cache-control": "no-store" } });
+  } catch (error) {
+    return apiError(error);
+  }
+}