Fix code scanning alert (#90)

* add ratelimiter to protected route

* remove server-side cache from protected route

Author: devksingh4

src/api/routes/protected.ts

@@ -1,11 +1,11 @@
 import { FastifyPluginAsync } from "fastify";
-import fastifyCaching from "@fastify/caching";
+import rateLimiter from "api/plugins/rateLimiter.js";
 
 const protectedRoute: FastifyPluginAsync = async (fastify, _options) => {
-  fastify.register(fastifyCaching, {
-    privacy: fastifyCaching.privacy.PRIVATE,
-    serverExpiresIn: 0,
-    expiresIn: 60 * 60 * 2,
+  await fastify.register(rateLimiter, {
+    limit: 15,
+    duration: 30,
+    rateLimitIdentifier: "protected",
   });
   fastify.get("/", async (request, reply) => {
     const roles = await fastify.authorize(request, reply, []);