Simplify names of base service types involving generics for logging

[brandur]

A small improvement to base service so that when it's using reflect to get a name of the service's type for logging purposes, it strips a long path out of a generic type for a more succinct result.

So this long, unsightly blemish:

QueryCacher[[]*github.com/riverqueue/riverui/internal/dbsqlc.JobCountByStateRow]

Would become this, which is quite a bit more tolerable:

QueryCacher[[]*dbsqlc.JobCountByStateRow]

[brandur]

thx.