Feature/663 paginate endpoints listing

Describe the MR

The listing of Endpoints is not longer caped to the page_size parameter of the API calls, but paginates thru the complete listing.

Why was this MR needed?

In case we have big clients :)

Extra-care points?

Does this MR meet the acceptance criteria?

• Documentation created/updated
• CHANGELOG updated
• Unit Tests added/updated

What are the relevant issue numbers?

Closes #663 (closed)

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