feat: render the Ordo changelog as a docs page

astro.config.mjs

@@ -103,6 +103,7 @@ export default defineConfig({
 						...openAPISidebarGroups,
 					],
 				},
+				{ label: 'Changelog', slug: 'changelog' },
 				{ label: 'Architecture', slug: 'architecture' },
 			],
 		}),

src/content/docs/changelog.md

@@ -0,0 +1,26 @@
+---
+title: Changelog
+description: Notable changes to Ordo, by release.
+---
+
+<!-- Synced from the ordo repository on each release. Do not edit here. -->
+
+Changes to Ordo since v0.1.0, which is the baseline this changelog starts from.
+That release and the v0.0.x development builds before it are not described here.
+
+This file lists changes that affect what Ordo does — features, fixes,
+performance, and breaking changes. It is generated from Conventional Commit
+subjects with [git-cliff](https://git-cliff.org); documentation, CI, and
+internal refactoring are omitted.
+
+## Unreleased
+
+### Features
+
+- **release:** Generate a changelog with git-cliff
+
+### Bug fixes
+
+- **orchestrator:** Notify on drift transitions, not on every check
+
+