When create a new issue or comment and paste/upload an attachment/image, it will not assign an issue id before submit. So if user give up the creating, the attachments will lost key feature and become dirty content. We don't know if we need to delete the attachment even if the repository deleted.
This PR add a repo_id in attachment table so that even if a new upload attachment with no issue_id or release_id but should have repo_id. When deleting a repository, they could also be deleted.
Co-authored-by: 6543 <6543@obermui.de>
* test: add current attachement responses
* refactor: check if attachement is linked and accessible by user
* chore: clean TODO
* fix: typo attachement -> attachment
* revert un-needed go.sum change
* refactor: move models logic to models
* fix TestCreateIssueAttachment which was wrongly successful
* fix unit tests with unittype added
* fix unit tests with changes
* use a valid uuid format for pgsql int. test
* test: add unit test TestLinkedRepository
* refactor: allow uploader to access unlinked attachement
* add missing blank line
* refactor: move to a separate function repo.GetAttachment
* typo
* test: remove err test return
* refactor: use repo perm for access checking generally + 404 for all reject
