Sync to a task-champion-server is broken in the nightly

### Describe your issue

I've tried to use the nightly that I built myself with flutter to connect to my task warrior server. However, it appears that the connection remains stalled and nothing happened. I couldn't see any error message on the server. I didn't have the opportunity to debug this with `adb` yet, might provide you with some more details on this.

Likewise, I might, add that I run the server locally on a VM with no HTTPS enabled. Likewise, I am not sure if this would be an issue.

### Steps to reproduce

1. Build the app with Flutter.
2. Install it on Android freshly
3. Change the Sync to be on Task v3
4. Add the task server configuration.
5. sync

### What was the expected result?

To see all my task's I have in my current task warrior.

### Put here any screenshots or videos (optional)

_No response_

### How can we contact you (optional)

_No response_

### Would you like to work on this issue?

None

### By submitting this issue, I have confirmed that:

- [x] I have starred the repo ⭐ and watched 👀 it on GitHub and followed the contribution guidelines.

ファイル、テスト、コードのエントリーポイントは指定されていません。まず、ローカルでホストされたHTTPSを使用しないTask v3 serverに対してnightly Flutter Android buildを再現し、同期の動作と利用可能なログを確認してください。同期が完了するか、タスクが表示されるか、または明確なエラーによって失敗の原因が特定されれば完了です。

索引モデルが issue の本文から書いたものです。