client-v2: reading a UInt64 column into a primitive POJO field throws ClassCastException

[polyglotAI-bot]

Describe the bug

Reading a UInt64 column into a primitive POJO field (e.g. private long) always fails with a
ClassCastException. Only boxed fields (BigInteger, Long) work, because those take the generic
BinaryStreamReader.readValue(...) path.

Steps to reproduce

@Data @AllArgsConstructor @NoArgsConstructor
public static class Dto {
    private int rowId;
    private long u64;     // primitive
    private long trailing;
}

final String sql = "SELECT toInt32(1) AS rowId, toUInt64(5) AS u64, toInt64(777) AS trailing";
TableSchema schema = client.getTableSchemaFromQuery(sql);
client.register(Dto.class, schema);
client.queryAll(sql, Dto.class, schema);

Expected behaviour

The UInt64 value is set on the primitive field.

Error log

ClientException: Failed to get query response
  -> ClientException: Failed to set value of 'u64
  -> java.lang.ClassCastException: class com.clickhouse.client.api.data_formats.internal.BinaryStreamReader
     cannot be cast to class java.math.BigInteger

Root cause

SerializerUtils.compilePOJOSetter has a dedicated branch for a primitive target field bound to a
UInt64 column (client-v2, around line 1239 on main):

} else if (targetType.isPrimitive() && column.getDataType() == ClickHouseDataType.UInt64) {
    mv.visitTypeInsn(CHECKCAST, Type.getInternalName(BigInteger.class));
    mv.visitMethodInsn(INVOKEVIRTUAL, BigInteger, targetType.getSimpleName() + "Value", ...);

At that point the operand stack holds [dtoObject, reader] — the branch never emits any
readValue/read* call, so the CHECKCAST is applied to the BinaryStreamReader instance itself
and the generated setter can never succeed. Nothing is read from the stream either, so the branch is
unusable for every primitive type, not just long.

Configuration

• Client version: main
• Client module: client-v2 (POJO read path)
• Server version: any (reproduced on latest)