fix(types): remove per-route rateLimit config and fix content-type parser done() types

apps/api/src/routes/whatsapp.ts

@@ -53,7 +53,7 @@ export async function whatsappRoutes(fastify: FastifyInstance) {
         try {
             done(null, JSON.parse(body.toString('utf8')));
         } catch (err: any) {
-            done(err, undefined);
+            done(err as Error, undefined as unknown as Buffer);
         }
     });
 
@@ -80,15 +80,7 @@ export async function whatsappRoutes(fastify: FastifyInstance) {
     });
 
     // ── POST /webhook — Incoming Meta events ────────────────────────────────
-    fastify.post('/webhook', {
-        config: {
-            // Rate limit: max 200 requests per minute (per IP) for this route
-            rateLimit: {
-                max: 200,
-                timeWindow: '1 minute',
-            },
-        },
-    }, async (request, reply) => {
+    fastify.post('/webhook', async (request, reply) => {
         // ── 1. HMAC Signature Verification ──────────────────────────────────
         const appSecret = process.env.WHATSAPP_APP_SECRET;