This adds the `update_sessions_pending_daily_snapshot` SQL function
which updates the `sessions_pending_daily_snapshot` table by inserting
values for any days missing from the table.
This also adds a check constraint to the
`sessions_pending_daily_snapshot` table along with a `comment on table`.
This also removes the hcp daily billing views since they are no longer
needed.
Ref: ace2def49d
Michael Gaffney
8159ddb08e