prevent multiple requests at the same time

src/components/progress-table.svelte

@@ -8,7 +8,10 @@
     clearInterval(interval);
 
     // Pooling interval to fetch entries every 31 seconds
+    let fetching = false;
     interval = setInterval(async () => {
+      if (fetching) return;
+      fetching = true;
       try {
         const promise = fetchEntries();
         // wait for the promise to resolve before assigning to prevent flash
@@ -16,6 +19,8 @@
         entriesPromise = promise;
       } catch (error) {
         console.error('Error fetching entries:', error);
+      } finally {
+        fetching = false;
       }
     }, 1000 * 31);