Large flowchart diagram failed to render on self-hosted gitea

[anubane]

Description

I have created a large flowchart diagram using mermaid within markdown, which renders ok on VSCode (using Matt Bierner's Markdown Preview Mermaid Support extension). However, when I push it to my self-hosted gitea server, I get the following error message:

Mermaid source of 5397 characters exceeds the maximum allowed length of 5000.

Software	Version
My gitea server version	1.21.5
Firefox version	121.0.1
Google Chrome version	121.0.6167.85
Mermaid version	mermaid.83a93d40.js

Not sure about the mermaid version, though my gitea server has the above named file!

Steps to reproduce

The flowchart describes a proprietary algorithm, and as such I cannot reproduce it here. However, if any other details are needed, I can provide that.

Screenshots

On the rendered page, I right clicked and selected View page source, which showed the following:

[anubane]

In a markdown file, inside a mermaid diagram, we can initialize some values:

```mermaid
%%{init: {'theme': 'forest'}}%%
flowchart TB
    direction TB

	p0([start])
‎ ```

The way I have initialized the theme, is there a means to set character limit?