Run CAS doctor on project import

[reckart]

Is your feature request related to a problem? Please describe.
CAS doctor is run by default on document import these days. However, it is not run on project import. Thus, if a project is externally created using a tool that might create inconsistent data (e.g. annotations outside sentence boundaries), the user will not notice that until they manually execute the CAS doctor.

Describe the solution you'd like
If running CAS doctor on import is enabled, it should probably also apply to documents that are imported as part of a full project import.

Describe alternatives you've considered

• Fail the project import if it contains a problematic document
• Fail only the individual document (may be problematic because documents cannot be imported individually from projects)
• Not fail the import but show warnings and suggest to run the CAS doctor.