Fix#28144
To make the resources will be cleanup once failed. All repository
operations now follow a consistent pattern:
- 1. Create a database record for the repository with the status
being_migrated.
- 2. Register a deferred cleanup function to delete the repository and
its related data if the operation fails.
- 3. Perform the actual Git and database operations step by step.
- 4. Upon successful completion, update the repository’s status to
ready.
The adopt operation is a special case — if it fails, the repository on
disk should not be deleted.
There are still some functions under `models` after last big refactor
about `models`. This change will move all team related functions to
service layer with no code change.
Part of #27065
This reduces the usage of `db.DefaultContext`. I think I've got enough
files for the first PR. When this is merged, I will continue working on
this.
Considering how many files this PR affect, I hope it won't take to long
to merge, so I don't end up in the merge conflict hell.
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Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
