feat: auto-generate release notes with git-cliff

Replace manual CHANGELOG.md and GitHub's generate_release_notes with
git-cliff, which parses conventional commit messages into grouped,
human-readable release notes.

- Add cliff.toml with commit grouping and date-based tag pattern
- Update release workflow: checkout with full history, run git-cliff
  with --unreleased, feed output as release body
- Replace CHANGELOG.md contents with convention docs

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: Starefossen

.github/workflows/release.yml

@@ -105,6 +105,11 @@ jobs:
     permissions:
       contents: write
     steps:
+      - uses: actions/checkout@v6
+        with:
+          ref: ${{ github.event.workflow_run.head_sha || github.sha }}
+          fetch-depth: 0
+
       - uses: actions/download-artifact@v8
         with:
           path: artifacts
@@ -125,13 +130,20 @@ jobs:
           echo "title=cnctl ${DATE} (${SHORT_SHA})" >> "$GITHUB_OUTPUT"
           echo "sha=${COMMIT_SHA}" >> "$GITHUB_OUTPUT"
 
+      - name: Generate release notes
+        id: changelog
+        uses: orhun/git-cliff-action@v4
+        with:
+          config: cliff.toml
+          args: --unreleased --tag ${{ steps.version.outputs.tag }}
+
       - name: Create release
         uses: softprops/action-gh-release@v2
         with:
           tag_name: ${{ steps.version.outputs.tag }}
           target_commitish: ${{ steps.version.outputs.sha }}
           name: ${{ steps.version.outputs.title }}
-          generate_release_notes: true
+          body: ${{ steps.changelog.outputs.content }}
           make_latest: true
           files: |
             artifacts/cnctl-*

CHANGELOG.md

@@ -1,29 +1,19 @@
 # Changelog
 
-All notable changes to this project will be documented in this file.
+Release notes are auto-generated from conventional commit messages using
+[git-cliff](https://git-cliff.org/). See the
+[GitHub Releases](https://github.com/CloudNativeBergen/website/releases) page
+for the full history.
 
-The format is based on [Keep a Changelog](https://keepachangelog.com/),
-and this project adheres to [Semantic Versioning](https://semver.org/).
+## Configuration
 
-## [Unreleased]
+Commit message conventions:
 
-### Added
+- `feat:` / `feat(scope):` — new features
+- `fix:` — bug fixes
+- `perf:` — performance improvements
+- `refactor:` — code refactoring
+- `docs:` — documentation changes
 
-- `cnctl admin sponsors email <id>` — send templated emails to sponsors
-  - Interactive fuzzy-search template picker, pre-sorted by relevance
-  - `--template <slug>` for non-interactive template selection
-  - `--message` for direct message (skip templates)
-  - `--edit` to open `$EDITOR` before sending
-  - `--dry-run` to preview without sending
-  - `--json` for machine-readable output
-  - Automatic variable substitution (`{{{SPONSOR_NAME}}}`, etc.)
-- Template variable engine (`template.rs`) with unresolved variable detection
-- Browser-based OAuth login (GitHub / LinkedIn) with conference selection
-- `cnctl login` / `cnctl logout` / `cnctl status` commands
-- `cnctl admin proposals list` — list all talk proposals
-- `cnctl admin proposals get <id>` — show proposal details with speakers, topics, and reviews
-- `cnctl admin sponsors list` — list sponsor pipeline with status and tier
-- `cnctl admin sponsors get <id>` — show sponsor details with contacts, billing, and notes
-- Colored terminal output for status fields
-- CI workflow (clippy, fmt, test) across Linux, macOS, and Windows
-- Release workflow with cross-compilation for 5 targets
+Commits prefixed with `chore:`, `style:`, `ci:`, `test:`, or `build(deps):`
+are excluded from release notes.

cliff.toml

@@ -0,0 +1,36 @@
+# git-cliff configuration for cnctl release notes
+# https://git-cliff.org/docs/configuration
+
+[changelog]
+header = ""
+body = """
+{%- for group, commits in commits | group_by(attribute="group") %}
+### {{ group | upper_first }}
+{%- for commit in commits %}
+- {% if commit.scope %}*({{ commit.scope }})* {% endif %}{{ commit.message | upper_first }}\
+{%- endfor %}
+{% endfor %}
+"""
+footer = ""
+trim = true
+
+[git]
+conventional_commits = true
+filter_unconventional = true
+split_commits = false
+commit_parsers = [
+    { message = "^feat", group = "Features" },
+    { message = "^fix", group = "Bug Fixes" },
+    { message = "^perf", group = "Performance" },
+    { message = "^refactor", group = "Refactor" },
+    { message = "^doc", group = "Documentation" },
+    { message = "^test", skip = true },
+    { message = "^style", skip = true },
+    { message = "^chore", skip = true },
+    { message = "^build\\(deps\\)", skip = true },
+    { message = "^build", group = "Build" },
+    { message = "^ci", skip = true },
+]
+filter_commits = false
+tag_pattern = "^\\d{4}\\.\\d{2}\\.\\d{2}-[0-9a-f]{7}$"
+sort_commits = "oldest"