[BUG] some bridge events may be ignored when `MaxCertSize` is non-zero

[xzav3r]

Bug Report

Description

When MaxCertSize is set to a non-zero value, some bridge events may be ignored. This happens because toBlock is updated in the limitCertSize method, but the outdated toBlock value is used when saving the certificate.

To Reproduce

1. set MaxCertSize = 1000000
2. start a mock L1 and L2 and CDK
3. sending 1000 bridge txs on L1 and L2 and waiting the pp generated

Expected behavior

no bridge events will be ignored