Validate sample source and material name columns

[mkuhring]

Warnings on

• Overlap of source and sample names
• Reuse of the same material name in different columns, even in different assays

Errors on

• Study sample names not a superset of assay sample names

[mkuhring]

This is more complex than I expected and would need some major restructuring. Therefore, I suggest postponing it for now.

Reuse of the same material name in different columns

Once we parsed we don't have any column information left, just the graph. We would need to recreate a table just for this validation or rely on the material name type (should be possible now that we going to use Library Name instead of a second Extract Name).

even in different assays

Currently we don't have any "parenting" structure, i.e. the context (joint usage) of investigation, studies and assays is currently provided by the API user. This might be something we want to change in general.

Study sample names not a superset of assay sample names

Same here.