add rate limit to all email-sending endpoints

backend/src/ee/routes/v1/access-approval-request-router.ts

@@ -2,6 +2,7 @@ import { z } from "zod";
 
 import { AccessApprovalRequestsReviewersSchema, AccessApprovalRequestsSchema, UsersSchema } from "@app/db/schemas";
 import { ApprovalStatus } from "@app/ee/services/access-approval-request/access-approval-request-types";
+import { writeLimit } from "@app/server/config/rateLimiter";
 import { verifyAuth } from "@app/server/plugins/auth/verify-auth";
 import { AuthMode } from "@app/services/auth/auth-type";
 
@@ -18,6 +19,9 @@ export const registerAccessApprovalRequestRouter = async (server: FastifyZodProv
   server.route({
     url: "/",
     method: "POST",
+    config: {
+      rateLimit: writeLimit
+    },
     schema: {
       body: z.object({
         permissions: z.any().array(),