fix(dbrunner): The key might be scalar

Author: pan93412

src/Service/Processes/DbRunnerProcessService.php

@@ -29,9 +29,7 @@ public function main(object $input): object
                 $rowCasted = [];
 
                 foreach ($row as $key => $value) {
-                    \assert(\is_string($key));
-
-                    $rowCasted[$key] = $value;
+                    $rowCasted[(string) $key] = $value;
                 }
 
                 $resultArray[] = $rowCasted;

tests/Service/DbRunnerTest.php

@@ -216,6 +216,14 @@ public static function runQueryProvider(): array
                 ],  /* result */
                 null, /* exception */
             ],
+            [
+                '',
+                'SELECT 1;',
+                [
+                    ['1' => 1],
+                ], /* result */
+                null, /* exception */
+            ],
         ];
     }