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

tests/test_app.py

@@ -510,14 +510,19 @@ app_title = WuttaTest
         self.assertIsInstance(dt, datetime.datetime)
         self.assertIsNone(dt.tzinfo)
 
-    def test_make_uuid(self):
-        uuid = self.app.make_uuid()
+    def test_make_str_uuid(self):
+        uuid = self.app.make_str_uuid()
         self.assertEqual(len(uuid), 32)
 
     def test_make_true_uuid(self):
         uuid = self.app.make_true_uuid()
         self.assertIsInstance(uuid, _uuid.UUID)
 
+    def test_make_uuid(self):
+        # TODO: temporary behavior
+        uuid = self.app.make_uuid()
+        self.assertEqual(len(uuid), 32)
+
     def test_progress_loop(self):
 
         def act(obj, i):

tests/test_util.py

@@ -4,6 +4,7 @@ import datetime
 import sys
 from unittest import TestCase
 from unittest.mock import patch, MagicMock
+from uuid import UUID
 
 import pytest
 
@@ -332,9 +333,17 @@ class TestMakeUTC(TestCase):
 
 class TestMakeUUID(TestCase):
 
-    def test_basic(self):
+    def test_str_uuid(self):
+        uuid = mod.make_str_uuid()
+        self.assertIsInstance(uuid, str)
+
+    def test_true_uuid(self):
+        uuid = mod.make_true_uuid()
+        self.assertIsInstance(uuid, UUID)
+
+    def test_temporary_behavior(self):
         uuid = mod.make_uuid()
-        self.assertEqual(len(uuid), 32)
+        self.assertIsInstance(uuid, str)
 
 
 class TestParseBool(TestCase):