(bug): one space as input returns empty digest

[cyclotruc]

Which interface did you use?

Web UI

Repository URL (if public)

No response

Git host

Other (specify below)

Other Git host

none

Repository visibility

public

Commit, branch, or tag

default branch

Did you ingest the full repository or a subdirectory?

Select one...

Operating system

Not relevant (Web UI)

Browser (Web UI only)

Chrome

Other browser

No response

Gitingest version

No response

Python version

No response

Bug description

When inputing (so just a space) in the form, we're met with this empty digest

Steps to reproduce

go to `gitingest.com` and input ` ` as the repo URL

Expected behavior

Should return an error for invalid input repository

Actual behavior

No response

Additional context, logs, or screenshots

No response