GitLab

retry activation and enable on foreground

This reverts commit 4e068a3a.

Adds response data to HTTPFailureReponse case.

Update documentation

It allows  to show the error response, if supplied, to the end user.
It helps in debugging.
The parsing of the response is left to the app that implements the SDK, since the responses can differ from one service to another.

Prevent possible deadlock in sync operation

Add background refresh task 

self.queue is blocked while detectExposures() is running and if queue.sync()
is called from the main thread, the completionHandler of detectExposures()
which is scheduled on the main thread, will never be called and we end up
in a deadlock.

This might improve background task scheduling in certain cases when background
processing tasks are not being re-scheduled (for example after device reboot).
The SDK does not perform a sync in this case, as it might be too time
consuming for app refresh tasks (which get a max runtime of 30s).

update version

dont store sync date if sync was skipped

update readme

adds tracing initialization state

# Conflicts:
#	Tests/DP3TSDKTests/DP3TSDKTests.swift

defer background task scheduling until app enters background

Merge branch 'bugfix/tracing-initialization' of github.com:DP-3T/dp3t-sdk-ios into bugfix/tracing-initialization

# Conflicts:
#	Tests/DP3TSDKTests/DP3TSDKTests.swift