- As part of merging support for Template RBAC
and user groups a permission check on reading files
was relaxed.
With the addition of admin roles on individual templates, regular
users are now able to push template versions if they have
inherited the 'admin' role for a template. In order to do so
they need to be able to create and read their own files. Since
collisions on hash in the past were ignored, this means that a regular user
who pushes a template version with a file hash that collides with
an existing hash will not be able to read the file (since it belongs to
another user).
This commit fixes the underlying problem which was that
the files table had a primary key on the 'hash' column.
This was not a problem at the time because only template
admins and other users with similar elevated roles were
able to read all files regardless of ownership. To fix this
a new column and primary key 'id' has been introduced to the files
table. The unique constraint has been updated to be hash+created_by.
Tables (provisioner_jobs) that referenced files.hash have been updated
to reference files.id. Relevant API endpoints have also been updated.
