feat(panettone): Increase session timeout to 90 days

The default was really annoyingly short - 90 days feels perfectly fine
for what we want, though we may want to increase even further.

Fixes: #19
Change-Id: I917abd95c4925f8491cd2be7cd87d91bb6621153
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1867
Tested-by: BuildkiteCI
Reviewed-by: kanepyork <rikingcoding@gmail.com>

web/panettone/src/panettone.lisp

@@ -537,6 +537,8 @@
   (when session-secret
     (setq hunchentoot:*session-secret* session-secret))
 
+  (setq hunchentoot:*session-max-time* (* 60 60 24 90))
+
   (setq *acceptor*
         (make-instance 'easy-routes:routes-acceptor :port port))
   (hunchentoot:start *acceptor*))