instead of `repo.ticket` and `repo.patch`, I'm introducing new groups for each: `track` and `review`. There are more data that are related to "something related to bug report / product management" and "something related to whole PR-review-merge flow". For former (track), `track.milestone` is pretty good example. For later (review), we can put things like semantic review states or merge-queue here. track is pretty poor naming, but I think we need some extra group here. "A git repository" is too broad topic in Tangled as a group. It's barly working as a NSID group name. I put some future record examples for each NSID groups under `unspecced.*`. Signed-off-by: Seongmin Lee <git@boltless.me>