[FEATURE] Increase description length

[aristizabal95]

Is your feature request related to a problem? Please describe.
Description field max length is too restrictive (20 characters). We could increase to something more sensible (good options are 256, 1024, etc. Define later the desired length).

[vpchung]

Thanks for suggesting this feature! It would be great if we could increase the length for dataset.location as well, as 20 chars is a bit limiting when there are multiple locations.

[aristizabal95]

• Set names to 64
• Set description to 256
• Set Location to 256
• Also check on pydantic models