comparison api unable to calculate the difference between the commit IDs

[ExplodingDragon]

Description

The API using (#30349) is unable to compare differences between diff commit ids. But it works fine on the Web UI.

Compare UI
Compare API

Gitea Version

main

Can you reproduce the bug on the Gitea demo site?

Yes

Log Gist

No response

Screenshots

No response

Git Version

No response

Operating System

No response

How are you running Gitea?

online

Database

None

[ExplodingDragon]

It seems that #30618 is blocking the commit id comparison.