feat(lstv2 move): moved lstv2 into this app to keep them combined and easier to maintain

lstV2/server/services/rfid/utils/rateLimit.ts

@@ -0,0 +1,19 @@
+const lastRunMap = new Map();
+
+/**
+ * Returns true if the function with a given key was called within the last `seconds`.
+ * @param {string} key - Unique key to track cooldown per function/context.
+ * @param {number} seconds - Cooldown in seconds.
+ * @returns {boolean} - true if should skip (still in cooldown), false if allowed.
+ */
+export function shouldSkipByCooldown(key: any, seconds: any) {
+    const now = Date.now();
+    const cooldown = seconds * 1000;
+
+    if (lastRunMap.has(key) && now - lastRunMap.get(key) < cooldown) {
+        return true;
+    }
+
+    lastRunMap.set(key, now);
+    return false;
+}