Allow integer sample identifiers

[grst]

Description of the bug

I don't see a good reason not to allow numeric sample identifiers and I don't think it's that uncommon to have some.

Part of the issue is that csvs are not typed. I think it would be reasonable to accept any type for sample id and just convert it to str internally.

Command used and terminal output

--input (../../01_prepare_data/output/1403-0008_rbm_pd/input.tsv): Validation of file failed:
        -> Entry 1: Error for field 'sample' (652111231906): Value is [integer] but should be [string] (Sample name must be provided and cannot contain spaces)

Relevant files

No response

System information

No response