fix: Autofix timeout bug

[BBerabi]

Description

Autofix Diffs flow (web view flow) was implemented slightly differently than the code action flow. The diff flow treated an empty list of suggestions as an error and invalid response. This is not the correct behavior because the AI Fix pipeline might run successfully and there can be no valid fixes found.

The code was polling until the suggestion's length was not 0. This causes the returned successful response with empty suggestions to be ignored and the code aggressively keeps polling until the timeout hits. The timeout takes 2 minutes whereas the result is available after several seconds. The timeout also hides the real issue from the user, making the user think something unexpected happened whereas we could not compute any valid fix.

This PR corrects the flow for autofix diffs by

• adding status into the return value similar to how it is done for code actions
• corrects the logic in the polling function

Checklist

• Tests added and all succeed
• Linted
• README.md updated, if user-facing
• License file updated, if new 3rd-party dependency is introduced

I uploaded a video to my drive showing the incorrect behavior on the IDE.
https://drive.google.com/file/d/1BlHmbkW5WEiSdPQKzmjoU-5IspK20PoZ/vi

and here the corrected behaviour which immediately shows user the result of 0 fixes

ide_no_timeout.mp4

[BBerabi]

I think the failing test is not related to my changes but because of an RCE vulnerability detected by Snyk Code. Is anyone already looking at it?

[ShawkyZ]

Thank you Berkay
It looks good to me besides some nitpicks.

Let's pair on it on Monday. I would like to revisit / understand some stuff here, like why do we have the AutofixStatus struct and if we can simplify/refactor it a bit.

[bastiandoetsch]

Some nitpicks - please decide yourself what to update :). Thanks for the PR, Berkay!