logger: add request id to log context for traceability

[paulaldridge]

this allows requests to be traced through the logs

Fixes #1547

[app-sre-bot]

Can one of the admins verify this patch?

[crozzy]

let's wait for https://github.com/quay/clair/pull/1514 to be merged so we can do the same for the matcher

[hdonnay]

I think this is done, as noted in the linked issue.