Release 0.12.0

CHANGELOG.md

@@ -10,6 +10,15 @@ ADR-007 and ADR-002.
 
 ## [Unreleased]
 
+## [0.12.0] - 2026-08-20
+
+Printers become a property of the bay rather than of whoever last walked up to a
+PC, and the container stops throwing away the site's own files on every update.
+
+**Air-gapped sites need a fresh offline bundle for this one.** The stack moves to
+MySQL 8.4 LTS, and an existing tarball only carries the 8.0 image, so
+`docker compose up` would ask for an image the site cannot pull.
+
 ### Added
 
 - **Printer assignment has a form.** `PrinterAssignmentPicker` is the ONE picker