feat: add singleton instance for rate limit system

Initialize the RateLimitSystem as a singleton to ensure a shared instance across the application, preventing redundant database connection handling.

Author: aquiveal

apps/webapp/app/v3/services/rateLimitSystemInstance.server.ts

@@ -0,0 +1,8 @@
+import { prisma } from "~/db.server";
+import { RateLimitSystem } from "./rateLimitSystem.server";
+import { singleton } from "~/utils/singleton";
+
+export const rateLimitSystem = singleton(
+  "rateLimitSystem",
+  () => new RateLimitSystem(prisma)
+);