Validator should alert about mismatch between participants.tsv's participant_id column and subject folders

[dungscout96]

participants.tsv in dataset ds003620 has illegal participant_id values as the first 9 subject IDs doesn't have the leading 0. Should it not pass the validator.
Similar issue for ds003800

[sappelhoff]

Thanks for the bug report.

• the datasets in question:
  • https://openneuro.org/datasets/ds003620/versions/1.1.1
  • https://openneuro.org/datasets/ds003800/versions/1.0.0

The mismatch between what's listed under participant_id in participants.tsv and the actual subject directories seems like something we should raise an error for.

Taking ds003800 as a showcase in the screenshots below:

see the missing leading zeros:

[effigies]

Resolved in schema validator.