Unify API returns to sql composite types, add pattern tests for REST API

Michal Zanderrequested to merge
mzander/add-pattern-test into develop

Requires haf!634 (merged)

Related with HAfAH!201 (merged)

  • Unifies API responses - adds exception handling instead of null values in composite types
  • every api returns sql type instead of json
  • adds patten tests for REST API
  • adds /version and /last-synced-block
Edited by Michal Zander

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