This removes an indirect import of `coderd/database` from the CLI and
results in a logical separation between server related and generalized
schedule.
No size change (yet).
Ref: #9380
* chore: add /v2 to import module path
go mod requires semantic versioning with versions greater than 1.x
This was a mechanical update by running:
```
go install github.com/marwan-at-work/mod/cmd/mod@latest
mod upgrade
```
Migrate generated files to import /v2
* Fix gen
