fix(hitl): set endedAt when cancelling paused execution

Without endedAt, the logs API running filter (isNull(endedAt)) would
keep cancelled paused executions in the running view indefinitely.

Author: waleedlatif1

apps/sim/lib/workflows/executor/human-in-the-loop-manager.ts

@@ -1287,7 +1287,7 @@ export class PauseResumeManager {
 
       await tx
         .update(workflowExecutionLogs)
-        .set({ status: 'cancelled' })
+        .set({ status: 'cancelled', endedAt: now })
         .where(eq(workflowExecutionLogs.executionId, executionId))
 
       return true