Consider adding "/country/{{country}}" to submission endpoint

[pithumke]

Current Implementation

Submission endpoint is /version/{{version}}/diagnosis-keys

Suggested Enhancement

Change submission endpoint to /version/{{version}}/diagnosis-keys/country/{{country}}.

Expected Benefits

At the moment we can not be 100% certain that we will never have to submit diagnosis keys to other countries. However, if we ever get that requirement, and needed to introduce a country differentiating parameter, this would be a breaking change and would force us to bump the overall API version. With the proposed change (and an initial implementation for only /version/v1/diagnosis-keys/country/DE), this issue can already be avoided. Also, the proposed change would align the submission and distribution APIs.

[christian-kirschnick]

There are rumours that Google/Apple will also spec the submission data, so let's wait until they publish their aligned protocol. It will most certainly also consider the country information.

[christian-kirschnick]

This topic will be dealt with in the Federation/Roaming scenario. Current plan is to have a list of countries in the submission payload in order to indicate for which countries the keys are of interest.