[client-v2,jdbc-v2] Reading Array(Nullable(String)) with BinaryString enabled

### Description
There is a claim:
```
Nullable array strings wrong
High Severity

It looks like readArray is using the top-level readValue for nullable array elements when binaryStringSupport is enabled. This means nested String/FixedString inside Array(Nullable(...)) are read as StringValue instead of plain String. This goes against our rule for container types and could lead to ArrayStoreException or unexpected type mismatches.
```

https://github.com/ClickHouse/clickhouse-java/pull/2952/changes/BASE..c74bd36aae7fd863f0691654f65c87cc9c982415#r3632548114

Comienza rastreando readArray y su uso de readValue cuando binaryStringSupport está habilitado, centrándote en Array(Nullable(String)) y en valores String o FixedString anidados. Confirma que el contenedor devuelve elementos String simples en lugar de StringValue y verifica que el array resultante evita la incompatibilidad de tipos o la ArrayStoreException indicada.

Escrito por el modelo de indexación a partir del texto del issue.