fix: Update throttle for /meta endpoints, will call every 2s for small account, 10s for large accounts (#11190)

This update improves the throttling mechanism for conversation meta
requests to optimize server load and enhance performance. The changes
implement differentiated thresholds based on account size - a 2-second
throttle for small accounts (≤100 conversations) and a 10-second
throttle for large accounts (>100 conversations).

Fixes #11178

app/javascript/dashboard/helper/specs/ConversationMetaThrottleManager.spec.js

@@ -0,0 +1,34 @@
+import ConversationMetaThrottleManager from '../ConversationMetaThrottleManager';
+
+describe('ConversationMetaThrottleManager', () => {
+  beforeEach(() => {
+    // Reset the lastUpdatedTime before each test
+    ConversationMetaThrottleManager.lastUpdatedTime = null;
+  });
+
+  describe('shouldThrottle', () => {
+    it('returns false when lastUpdatedTime is not set', () => {
+      expect(ConversationMetaThrottleManager.shouldThrottle()).toBe(false);
+    });
+
+    it('returns true when time difference is less than threshold', () => {
+      ConversationMetaThrottleManager.markUpdate();
+      expect(ConversationMetaThrottleManager.shouldThrottle()).toBe(true);
+    });
+
+    it('returns false when time difference is more than threshold', () => {
+      ConversationMetaThrottleManager.lastUpdatedTime = new Date(
+        Date.now() - 11000
+      );
+      expect(ConversationMetaThrottleManager.shouldThrottle()).toBe(false);
+    });
+
+    it('respects custom threshold value', () => {
+      ConversationMetaThrottleManager.lastUpdatedTime = new Date(
+        Date.now() - 5000
+      );
+      expect(ConversationMetaThrottleManager.shouldThrottle(3000)).toBe(false);
+      expect(ConversationMetaThrottleManager.shouldThrottle(6000)).toBe(true);
+    });
+  });
+});