Improve Task Assignment Handling

[shiv810]

Problem

Contributors are blocked from assigning new tasks due to the current task limit, even when they’ve addressed all open review threads and are waiting on reviewers. This bottleneck discourages contributors and slows down productivity.

Proposed Solution

Add logic to check if the assignee is the last commenter on all unresolved review threads.
Introduce a 24-hour timeout after the last comment before considering tasks "reviewer-lagged."
Allow contributors to bypass the limit in such cases without affecting their task slots.
Concerns

Assignees might misuse this by "resolving" threads without addressing the issues.
Additional safeguards may be needed to ensure resolution integrity.
References