chore: prepare release 0.23.0

NEWS.md

@@ -3,6 +3,25 @@
 This file summarizes the user-visible changes to `radicle-ci-broker`
 between releases.
 
+## Version 0.23.0, released 2025-11-25
+
+* There is now a "terminate this CI run" event. It will make `cib` terminate a
+  currently executing CI run. The event can be added to the event queue with
+  `cibtool --db ci.db event terminate c12c6749-b708-4a2e-8ec1-c10f1e9817e4`, where
+  the last argument is the broker run ID (not the adapter run ID).
+
+* If the event queue has a "shut down" event, it it picked first. This avoids
+  having to wait for the queue to be processed until the shut down event is
+  next. The shut down event will prevent any new CI runs from being started.
+
+* There is now a document on how to implement an
+  adapter (`doc/adapter-impl.md`), rendered online at
+  <https://radicle-ci.liw.fi/radicle-ci-broker/adapter-impl.html>.
+
+* A small bug fix to the log messages for filtering tag events: the now say
+  they are for tag events instead of branch events. The perils of having copy
+  pasta for lunch. Found by Yorgos Saslis.
+
 ## Version 0.22.0, released 2025-11-12
 
 * New event filter `AnyDelegate` is true if the change originates