Use the data_pipeline_api issues to keep track of issues when generating output

[aflag]

Whenever we log an warning, we should instead create an issue such as

https://github.com/ScottishCovidResponse/data_pipeline_api/blob/e7059c4c0fbfc697de861a220d24bb0d8fece54b/data_pipeline_api/standard_api.py#L31

that should be attached back to the output:

https://github.com/ScottishCovidResponse/simple_network_sim/blob/master/simple_network_sim/sampleUseOfModel.py#L69

[github-actions[bot]]

Heads up @magicicada @bobturneruk @aflag @WPettersson @alex-konovalov @may1066 @mrow84 - the "Simple Network Sim" label was applied to this issue.

[aflag]

Duplicated