Bug: PDF formatting issue when having to long source blocks

[CMon]

Describe the bug

If the source block happens to be on top of a page break the grey bar on the left is not respecting the page margins.

To Reproduce

create the following files:

main.sdoc:

[DOCUMENT]
TITLE: long source

[TEXT]
STATEMENT: Main file

[REQUIREMENT]
UID: REQ-003
TITLE: one
STATEMENT: >>>
long source content:

    i++

    i++

    i++

    i++

    i++

    i++

    i++

    i++

    i++

    i++

    i++

    i++

    i++

    i++

    i++

    i++

    i++

    i++

    i++
<<<

strictdoc_config.py:

from strictdoc.core.project_config import ProjectConfig

def create_config() -> ProjectConfig:
    config = ProjectConfig(
        project_title = "POC Bug",
        project_features = [
            "SEARCH",
            "HTML2PDF",
        ],
        server_host = "localhost",
        server_port = 5000,
    )
    return config

using the current --pre strictdoc from #2503 with the current Dockerfile:
docker run --rm -v $(pwd):/data -e HOST_UID=$(id -u) -e HOST_GID=$(id -g) -p 5000:5000 -it strictdoc:latest /bin/bash -c 'cd /data && strictdoc export . --output-dir output --formats html2pdf'

Expected behavior

no grey boarder in footer and header

Screenshots