chore: Switch to a different completed tasks endpoint

[scottlovegrove]

Overview

The endpoint we were using for completed tasks is being deprecated and we need to move to a new one.

Initially this would have been to move to archive/items, but this is to be renamed shortly to tasks/archived. I've gone with the latter here, even though it's not live, so this PR can't be merged until this one on the backend has been.

I've also increased the limit to 200, as per the docs of the endpoint to be used to decrease the number of times we may have to call it.

Reference

PR to deprecate the existing endpoint: https://github.com/Doist/Todoist/pull/19393
PR to rename endpoint: https://github.com/Doist/Todoist/pull/19394

Test Plan

• Run the extension
• Export a project known to have completed tasks
  • The completed tasks show in the exported google sheet.

[scottlovegrove]

The order in which PRs should be merged are as follows:

1. PR to rename endpoint (ref)
2. This PR (once the PR from 1 is deployed)
3. PR to deprecate old endpoint (ref)

@nats12 I've tagged you in this as the frontend's API update person. If you need assistance to test the PR when (1) has been merged, please speak to Pawel or Francesca, but it should be easy enough to get going.

@PotHix for visibility.

[nats12]

🚀

[PotHix]

3. PR to deprecate old endpoint (ref)

3 can be merged in any order. The deprecation of the endpoint will only affect new minor versions, and the actual deprecation of v9 will happen ~Q2 2025.

@nats12 I will ping you as soon as the changes are in place. @scottlovegrove will be OOO for holidays soon. :)