Log more "groupable" events to sentry

[chris48s]

Because most of the events we log to sentry include a postcode in the call/stacktrace, sentry logs lots of unique issues which are actually the same fundamental issue raises by a different API call.

It would be useful to see if we can make what we send to sentry more generic (so it can be grouped into one issue with lots of events) without losing the repro case.