Release v0.2.3

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -56,4 +56,29 @@ The app is an Axum HTTP server with shared state (`AppState`) containing two com
 
 ## Releases
 
-Pushing a `v*` tag triggers the GitHub Actions release workflow, which builds a Linux binary and uploads it to a GitHub Release.
+Pushing a `v*` tag triggers the Gitea Actions release workflow, which builds a
+Linux binary, uploads it to a Gitea Release, and pushes a Docker image to the
+Gitea container registry.
+
+### Cutting a release
+
+1. Move the `[Unreleased]` entries in `CHANGELOG.md` to a new versioned section:
+   ```markdown
+   ## [0.x.y] - YYYY-MM-DD
+   ```
+2. Add a new empty `## [Unreleased]` section at the top.
+3. Update the comparison links at the bottom of `CHANGELOG.md`:
+   - Change the `[Unreleased]` link to compare the new tag against `HEAD`.
+   - Add a new link for the new version comparing it against the previous tag.
+4. Commit: `git commit -m "Release v0.x.y"`
+5. Tag and push:
+   ```bash
+   git tag v0.x.y
+   git push origin main v0.x.y
+   ```
+
+### Changelog conventions
+
+`CHANGELOG.md` follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
+Group entries under: `Added`, `Changed`, `Deprecated`, `Removed`, `Fixed`, `Security`.
+Record notable changes in `[Unreleased]` as you make them, not only at release time.