File changes not updated in multiple turns of chat sessions

[rebornix]

Setup:

• "chat.agentSessionsViewLocation": "view",
• "githubPullRequests.codingAgent.uiIntegration": true,

Reproduce:

• Start a Padawan task with the cloud button or #copilotCodingAgent
• A chat editor is opened and starts to stream in session logs
• After the session finishes, it shows a changed file part
• In the chat editor input box, ask it to change a different file, send
• After the second session/response finishes, it shows a changed file part again, but it doesn't include the new changes.

[rebornix]

This is already fixed and shipped in latest prerelease from release branch.