Integrate API endpoints with HEBorn

[renatomassaro]

This change is 

[sourcelevel-bot[bot]]

Ebert has finished reviewing this Pull Request and has found:

• 5 possible new issues (including those that may have been commented here).

You can see more details about this review at https://ebertapp.io/github/HackerExperience/Helix/pulls/309.

[renatomassaro]

Reviewed 17 of 17 files at r1. Review status: all files reviewed at latest revision, 1 unresolved discussion.

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lib/story/event/email.ex, line 36 at r1 (raw file):

      def generate_payload(event, _socket) do
        # TODO: contact id

Create issue or fix on this PR

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