Export query sorts incorrectly

[clairblacketer]

In some of the export queries, they are ordering on stratum_1. In the cases where stratum_1 is an integer being cast as a varchar, this ordering is occurring incorrectly. This can be corrected by multiplying by 1.0 in the order statement.

Link to example: https://github.com/OHDSI/Achilles/blob/86741da9c8ad74a5be7785d7b9da24aacfa4c09e/inst/sql/sql_server/export/observationperiod/periodsperperson.sql#L1C1-L1C1