Implements automatic closing of linked GitHub issues when a task is deleted (FN-4253), adding deletion logic to the GitHub tracking state module with corresponding tests for both state management and deletion behavior, plus a patch changeset for the `@runfusion/fusion` CLI.
Fusion-Task-Id: FN-4253
Implements a tracking auth resolver with forced GitHub client authentication mode, wiring it across the GitHub tracking lifecycle and settings UI. The feature spans six steps: adding the resolver, forced auth mode, routing tracking issue creation through the resolver, and wiring into lifecycle and s
Fusion-Task-Id: FN-3875
Added a GitHub tracking state service (`GitHubTrackingStateService`) and `setIssueState` client method to support closing and reopening tracked issues, with test coverage for both the client and the service, wired into the GitHub routes, and documented in the architecture docs.
Fusion-Task-Id: FN-3873
