fix: classify SQLSRV foreign key violations

Signed-off-by: memleakd <121398829+memleakd@users.noreply.github.com>

Author: memleakd

system/Database/SQLSRV/Connection.php

@@ -117,6 +117,16 @@ protected function isUniqueConstraintViolation(int|string $code, string $message
         return false;
     }
 
+    /**
+     * Checks whether the native database error represents a foreign key constraint violation.
+     */
+    protected function isForeignKeyConstraintViolation(int|string $code, string $message): bool
+    {
+        return $this->getVendorErrorCode($code) === 547
+            && $this->hasSQLState($code, '23000')
+            && str_contains($message, 'FOREIGN KEY constraint');
+    }
+
     /**
      * Checks whether the native database error represents a NOT NULL constraint violation.
      */

tests/system/Database/ConstraintViolationExceptionTest.php

@@ -225,6 +225,13 @@ public static function provideCreatesConstraintViolationExceptions(): iterable
             UniqueConstraintViolationException::class,
         ];
 
+        yield 'SQLSRV foreign key' => [
+            self::connection(SQLSRVConnection::class, 'SQLSRV'),
+            '23000/547',
+            'The INSERT statement conflicted with the FOREIGN KEY constraint.',
+            ForeignKeyConstraintViolationException::class,
+        ];
+
         yield 'SQLSRV generic constraint' => [
             self::connection(SQLSRVConnection::class, 'SQLSRV'),
             '23000/547',