Fix additional test pollution and Eloquent query builder issues

1. **EntryCustomerRepositoryTest** - Added Stache clearing in beforeEach to
   prevent customer data accumulation across tests

2. **EloquentQueryBuilder::whereStatusLogDate** - Fixed "Relation statusLog
   does not exist" error by using native Eloquent builder's whereHas instead
   of Statamic's overridden version which expects blueprint-based relationships

Author: claude

src/Orders/EloquentQueryBuilder.php

@@ -67,11 +67,13 @@ public function wherePaymentStatus(PaymentStatus $paymentStatus)
 
     public function whereStatusLogDate(OrderStatus|PaymentStatus $status, Carbon $date)
     {
-        return $this->whereHas('statusLog', function ($query) use ($status, $date) {
+        $this->builder->whereHas('statusLog', function ($query) use ($status, $date) {
             return $query
                 ->where('status', $status->value)
                 ->whereDate('timestamp', $date->format('Y-m-d'));
         });
+
+        return $this;
     }
 
     protected function columnExists(string $column): bool

tests/Customers/EntryCustomerRepositoryTest.php

@@ -12,6 +12,10 @@
 
 uses(PreventsSavingStacheItemsToDisk::class);
 
+beforeEach(function () {
+    Stache::store('entries')->clear();
+});
+
 afterEach(function () {
     Collection::find('customers')->queryEntries()->get()->each->delete();
 });