fix(scheduler): use equals: null filter for endDate to satisfy Prisma where syntax and stop log spam

frontend/src/components/events/MatchingRunsSection.jsx

@@ -1,4 +1,4 @@
-import { useEffect, useState } from 'react';
+import { useEffect, useState, Fragment } from 'react';
 import { adminAPI } from '../../services/api';
 import { RefreshCcw, Play, ChevronDown, ChevronRight } from 'lucide-react';
 
@@ -117,8 +117,8 @@ export default function MatchingRunsSection({ slug }) {
               </tr>
             ) : (
               runs.map((run) => (
-                <>
-                  <tr key={run.id} id={`run-${run.id}`}>
+                <Fragment key={run.id}>
+                  <tr id={`run-${run.id}`}>
                     <td className="px-3 py-2 text-sm text-gray-700">
                       <button
                         onClick={() => toggleViewPairs(run.id)}
@@ -173,7 +173,7 @@ export default function MatchingRunsSection({ slug }) {
                       </td>
                     </tr>
                   )}
-                </>
+                </Fragment>
               ))
             )}
           </tbody>