REST-API: add path "/open" that redirects to maindoc of a derivate

Description

The following REST-API url should redirect to the maindoc of the given derivate:
http://localhost:8080/mir/api/v1/objects/mir_mods_00000001/derivates/mir_derivate_0000000002/open

Environment

None

Assignee

Robert Stephan

Reporter

Robert Stephan

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Priority

Medium
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