More rebranding changes (#159)

* Replace Maybe for Sure in select code areas

* Make sure passwords are consistent

* Remove (admin|member) from demo data first name

* Database and schema names finally to `sure`

* Fix broken test

* Another (benchmarking) database name to `sure_*`

* More rebranding to Sure

* Missed this Maybe mention in the same page

* Random nitpicks and more Maybes

* Demo data accounts and more Maybes

* Test data account updates

* Impersonation test accounts

* Consistency with `compose.example.yml`

test/models/family_export_test.rb

@@ -29,7 +29,7 @@ class FamilyExportTest < ActiveSupport::TestCase
   test "filename is generated correctly" do
     travel_to Time.zone.local(2024, 1, 15, 14, 30, 0) do
       export = @family.family_exports.create!
-      expected_filename = "maybe_export_20240115_143000.zip"
+      expected_filename = "sure_export_20240115_143000.zip"
       assert_equal expected_filename, export.filename
     end
   end