fix: add make_str_uuid() to disambiguate what callers want

first step on the way to fixing `make_uuid()` so it always returns a
proper UUID instance

docs/glossary.rst

@@ -321,6 +321,13 @@ Glossary
      the real workhorse; each can perform a different function with a
      custom arg set.  See also :doc:`narr/cli/index`.
 
+   uuid
+     Universally-unique identifier.  All built-in :term:`data models
+     <data model>` have a UUID column for primary key.
+
+     Call :meth:`~wuttjamaican.app.AppHandler.make_uuid()` to get a
+     new UUID.
+
    virtual environment
      This term comes from the broader Python world and refers to an
      isolated way to install :term:`packages<package>`.  See also