[java-bigquery] Schema not propagated when querying for array of structs

#### Environment details

1. Specify the API at the beginning of the title. For example, "BigQuery: ...").
```kotlin
implementation("com.google.cloud:google-cloud-bigquery:2.41.0")
```
2. OS type and version: MacOS
3. Java version: 21

#### Steps to reproduce

1. Create a table with a repeated struct schema.
2. Query the same table, try to access the nested record fields by name. This fails because no schema is attached.

#### Code example

Reproduced here: https://github.com/FredrikMeyer/bigquery-bug/blob/main/src/test/java/no/fredrikmeyer/MainTest.java

```java
var query = "select * from my_dataset.my_table";

QueryJobConfiguration queryJobConfiguration = QueryJobConfiguration.newBuilder(query).setUseLegacySql(false).build();

var res2 = bigQuery.query(queryJobConfiguration);

res2.iterateAll().forEach(r -> {
// Prints true
System.out.println(r.hasSchema());
// Prints false, even though the schema is defined above
System.out.println(r.get("arr").getRepeatedValue().getFirst().getRecordValue().hasSchema());
});
```

#### Any additional information below

When having an array of structs, the schema does not seem to be propagated to the fields. Thanks!