Release 0.9.0

CHANGELOG.md

@@ -10,6 +10,16 @@ ADR-007 and ADR-002.
 
 ## [Unreleased]
 
+## [0.9.0] - 2026-08-11
+
+Driven by a fleet that had been failing quietly. A bay had been returning 500
+to every collector report since it was imaged, backups were accumulating
+duplicate revisions on any machine number more than one PC reported against,
+and a setting that looked configurable had never been readable by the script
+that consumed it. The theme of the release is making those failures visible:
+each fix ships with the check, report or document that would have surfaced it.
+
+
 ### Fixed
 
 - A shop-floor PC that reported the machine number of a machine ShopDB already