feat: allow admin to set logging format from config.ini This is prep work for adding a per thread logging variable that can be used to tie all logs for a single request together. This uses the same default logging format as before, just moves it to config.ini. Also because of configparser, the logging format has to have doubled % signs. So use: %%(asctime)s not '%(asctime)s' as configparser tries to interpolate that string and asctime is not defined in the configparser's scope. Using %%(asctime)s is not interpolated by configparser and is passed into Roundup.

--- a/CHANGES.txt	Mon Sep 01 20:35:54 2025 -0400
+++ b/CHANGES.txt	Mon Sep 01 21:54:48 2025 -0400
@@ -42,6 +42,8 @@
 - add readline command to roundup-admin to list history, control input
   mode etc. Also support bang (!) commands to rerun commands in history
   or put them in the input buffer for editing. (John Rouillard)
+- add format to logging section in config.ini. Used to set default
+  logging format. (John Rouillard)
 
 2025-07-13 2.5.0