[Enhancement] PR update message with summarized details

[malhotra5]

Current

Openhands resolver updates PR branches based on review comments. When the PR branch is updated with new code, openhands resolver creates a new comment thread containing

"New openhands update"

to indicate the PR has been updated.

Also, a reply is left for every unresolved review comment thread with a summary of code changes made to address that specific comment.

Enhancement

Change the PR update message (the new comment thread) to be an AI generated summary of all replies made to each unresolved comment thread (as opposed to the fixed message).

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[github-actions]

OpenHands started fixing the issue! You can monitor the progress here.

[github-actions]

The workflow to fix this issue encountered an error. Please check the workflow logs for more information.