Annotating pg_dump/pg_restore

Hi,
Normally I try to annotate incoming queries, to make it easier to diagnose
slow ones. For example:

-- Users.findByPhoneNumber
SELECT * FROM ....

The pg_dump and pg_restore commands issue a COPY with no possibility of
adding a comment. It would be useful to know who or what exactly is
performing a COPY against a database - maybe a nightly backup script, maybe
a developer copying a table.

I was wondering if you could have a command line flag that let you attach a
comment to the query?

Thanks!
Kevin

--
kevin