Changes to Create a dataset by importing history instead of uploading it

request property cadence was restricted to a list of enum values

request property dex/network was restricted to a list of enum values

removed the request property dex/cadence

removed the request property dex/provider

added the new optional request property dex/id

added the new 1m enum value to the request property cadence

added the new 1s enum value to the request property cadence

added the new 5m enum value to the request property cadence

added the new ethereum enum value to the request property dex/network

added the new robinhood enum value to the request property dex/network

added the new optional request property dex/cadence

added the new optional request property dex/provider

the request property dex/version became optional

endpoint added