[Bug]: Pls fix eth_feeHistory hex

### Describe the bug

WARN [03-08|17:19:24.100] Served eth_feeHistory conn=172.25.0.2:42268 reqid=7521367827100560 duration="30.591µs" err="invalid argument 1: invalid hex string"

`ethereum get feeHistory changed from decimal to hex`

### Steps to reproduce

1.
.

### Error messages or log output

_No response_

### Version

10.10.2

### Build type

Flask

### Browser

Chrome

### Operating system

Windows

### Hardware wallet

Other (please elaborate in the "Additional Context" section)

### Additional context

_No response_

The issue names no source files or tests. Start by tracing the eth_feeHistory request handling and reproducing the invalid hex string warning with version 10.10.2; done means the request accepts the expected hex format without that error.

Written by the indexing model from the issue text.