[Bug] Official version of the 0.5 paimon when writing in the primary key table updates' indexOutOfBoundsException 'error, try again using a snapshot of the version 0.6 when the error is still there

### Search before asking

- [X] I searched in the [issues](https://github.com/apache/incubator-paimon/issues) and found nothing similar.

### Paimon version

0.5-incub and 0.6-11-20 snapshot version

### Compute Engine

FlinkSQL

### Minimal reproduce step

1th: kafka to paimon primary key and 1 bucket table , store as orc
2th:The length of a single field is close to 10 million
3th:The above error occurred while writing to the table continuously

### What doesn't meet your expectations?

Write to the primary key table normally, and update or add it normally

### Anything else?

No

### Are you willing to submit a PR?

- [ ] I'm willing to submit a PR!

Start by reproducing the continuous FlinkSQL write from Kafka into a one-bucket Paimon primary-key table stored as ORC, using a field near 10 million characters. Inspect the resulting IndexOutOfBoundsException and compare behavior across the reported Paimon versions. Done means primary-key inserts and updates complete normally without the error.

Written by the indexing model from the issue text.