WebAPI Samples Not Consistent On Sweeper and Archiver

**Is your feature request related to a problem? Please describe.**
The Web API samples have a stand-alone Sweeper. The sample code is not:

* Consistent in its usage of UseOutboxSweeper and UseOutboxArchiver, omitting one or both
* Does not use the appropriate distributed lock for the other database in use in the solution

As a result, they don't show how to get this "right"

**Describe the solution you'd like**
The samples should demonstrate the correct usage of the archiver and sweeper

Compare the Web API samples with the stand-alone Sweeper sample and inspect how each uses UseOutboxSweeper and UseOutboxArchiver. Check which other database each solution uses and how its distributed lock is configured; done means the samples consistently demonstrate both components with the appropriate lock.

Written by the indexing model from the issue text.