fix: refuse implausible accommodation booking prices

tests/Entity/Groups/AccommodationBookingTest.php

@@ -7,6 +7,7 @@ namespace App\Tests\Entity\Groups;
 use App\Entity\Groups\AccommodationBooking;
 use App\Enum\Groups\AccommodationBookingOrigin;
 use App\Enum\Groups\AccommodationBookingStatus;
+use App\Exception\ImplausibleBookingPriceException;
 use PHPUnit\Framework\Attributes\DataProvider;
 use PHPUnit\Framework\TestCase;
 
@@ -87,6 +88,36 @@ class AccommodationBookingTest extends TestCase
         }
     }
 
+    public function testAnImplausibleTotalIsRefusedRatherThanStored(): void
+    {
+        // The pax count and the nights are capped, so what gets here is a catalog price with a
+        // digit too many. A stored total would end up on an offer; the INT column would answer
+        // it with SQLSTATE 22003 and say nothing about the cause.
+        $booking = new AccommodationBooking();
+        $booking->setDateFrom(new \DateTimeImmutable('2026-09-23'));
+        $booking->setDateTo(new \DateTimeImmutable('2026-09-25'));
+        $booking->setPaxCount(40);
+
+        $this->expectException(ImplausibleBookingPriceException::class);
+
+        $booking->setPriceSnapshot(['total' => AccommodationBooking::MAX_TOTAL_PRICE + 1], AccommodationBooking::MAX_TOTAL_PRICE + 1, 'EUR', 1);
+    }
+
+    public function testATotalAtTheCeilingIsStillStored(): void
+    {
+        $booking = new AccommodationBooking();
+        $booking->setPriceSnapshot(['total' => AccommodationBooking::MAX_TOTAL_PRICE], AccommodationBooking::MAX_TOTAL_PRICE, 'EUR', 1);
+
+        self::assertSame(AccommodationBooking::MAX_TOTAL_PRICE, $booking->getTotalPrice());
+    }
+
+    public function testTheCeilingLeavesTheIntColumnRoomToSpare(): void
+    {
+        // The ceiling exists to keep implausible prices out, not to use up the column: a total
+        // that needs more room than this is a mistake, never a wider column.
+        self::assertLessThan(2147483647, AccommodationBooking::MAX_TOTAL_PRICE);
+    }
+
     public function testTheLabelIsIndependentOfWhereTheBookingCameFrom(): void
     {
         // Origin answers "how did this come about" and is deliberately not the same