Connect the rerun button to the handler that was waiting for it

The list emitted executionRerunRequested and the executor had a handler
for it, but the template never bound the two: pressing rerun on a
finished run emitted into nothing, not even an HTTP call. The button
stayed enabled because it only looks at the status.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

src/app/layouts/tasks-executor/tasks-executor.html

@@ -7,6 +7,7 @@
         [selectedExecutionId]="selectedExecutionId()"
         (executionSelected)="selectExecution($event)"
         (executionDeleteRequested)="removeExecution($event)"
+        (executionRerunRequested)="rerunExecution($event)"
         (compareRequested)="openComparison($event)">
       </app-tasks-executions-list>