bug: root span of periodic jobs is not captured

[ernado]

Looks like tracing is not fully working for jobs.

Shutdown is graceful and should ensure that all traces are sent:

{"level":"info","ts":1682941627.9527965,"caller":"app/app.go:97","msg":"Waiting for application shutdown"}
{"level":"debug","ts":1682941627.9528267,"logger":"metrics","caller":"app/metrics.go:78","msg":"Shutting down metrics"}
{"level":"info","ts":1682941627.9529154,"logger":"metrics","caller":"app/metrics.go:117","msg":"Waiting for shutdowns","shutdowns":["http","tracer","meter"]}
{"level":"debug","ts":1682941627.9530478,"logger":"metrics","caller":"app/metrics.go:71","msg":"Metrics server gracefully stopped"}
{"level":"debug","ts":1682941627.9531858,"logger":"metrics","caller":"app/metrics.go:85","msg":"Stopped metrics"}
{"level":"info","ts":1682941627.9532175,"caller":"app/app.go:121","msg":"Application stopped"}

However, they are missing for some reason.