fix(task-manager): use event._id instead of groupHash in issue event URL

[Copilot]

The GitHub issue body generated by the task-manager worker contained an incorrect event URL, using groupHash as the event identifier instead of the event's _id.

Change

• workers/task-manager/src/utils/issue.ts: Replace event.groupHash with event._id in the event URL template

- const eventUrl = `${garageUrl}/project/${projectId}/event/${event.groupHash}`;
+ const eventUrl = `${garageUrl}/project/${projectId}/event/${event._id}`;

Resulting URL format: /project/<project_id>/event/<event_id>

[codex-assistant]

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[codex-assistant]

Thanks for adding a description — the PR is now marked as Ready for Review.

[codex-assistant]

Thanks for adding a description — the PR is now marked as Ready for Review.