[bug]: failed to add file as attachment when the size of file is greater than 5MB

Is there an existing issue for this?

• I have searched the existing issues

Current behavior

When I add a file greater than 5MB, there will be snackbar pop out and show me the error message "Failed to upload, attachment greater than 5MB", or similar message like that.

I have a few questions:

1. Is this hard-limit? or it can be configured into different size or completely disable this limit.
2. Why there is such limit? What underlay component introduce the limit?
3. if this is hard-limit, can it be removed in the future?

Steps to reproduce

1. Upload file with size greater than 5MB.
2. It will pop up error message.

Environment

Production

Browser

Google Chrome

Variant

Self-hosted

Version

v1.3.0