Release 0.1.1-rc.13

Housecarl 0.1.1's thirteenth release candidate. Since rc.12: quota usage
is saved after every change. make test and make e2e (304 checks) pass.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -123,7 +123,7 @@ The web UI is on `http://127.0.0.1:8070/` (see `listen` in
 
 ## Status
 
-Housecarl 0.1.1 is in testing (0.1.1-rc.12): zones, address sets and
+Housecarl 0.1.1 is in testing (0.1.1-rc.13): zones, address sets and
 services with ordered rules, IPv4 and IPv6, port forwards with hairpin NAT
 and IPv6 pinholes, source NAT and redirects, built-ins, probation for
 network changes (confirmed by the client that made them), the ruleset