Review & enforce list of supported schema versions #43
Description
This is currently only in-place in tests: https://github.com/fractal-analytics-platform/fractal-task-tools/blob/main/tests/scripts/validate_multi_draft.py.
After we review #4 (and a corresponding fractal-web issue), we may come up with a list of supported schema versions (e.g. a certain set of JSON Schema drafts and/or some OpenAPI versions - possibly with some scope limitations e.g. as ajv does).
Once we have that list, we should also check compliance during schema generation in fractal-task-tools, and either fail or at least emit a warning when the generated schemas do not comply.