feat: re-add git-cliff using official marketplace action

Re-implemented automated changelog generation using the official
git-cliff-action from GitHub Marketplace (verified).

- Uses orhun/git-cliff-action@v4 (verified in marketplace)
- Replaced peter-evans/create-pull-request with GitHub CLI
- Added skip rule for dependency update commits
- Maintains conventional commit parsing

The workflow will automatically generate changelog updates
and create PRs when commits are pushed to main.

Author: lainra

.github/cliff.toml

@@ -0,0 +1,65 @@
+# Configuration for git-cliff changelog generator
+
+[changelog]
+# Changelog header
+header = """
+# Changelog
+
+All notable changes to Claude Code Telemetry will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+"""
+# Template for the changelog body
+body = """
+{% if version %}\
+    ## [{{ version | trim_start_matches(pat="v") }}] - {{ timestamp | date(format="%Y-%m-%d") }}
+{% else %}\
+    ## [Unreleased]
+{% endif %}\
+
+{% for group, commits in commits | group_by(attribute="group") %}
+    ### {{ group | upper_first }}
+    {% for commit in commits %}
+        - {% if commit.breaking %}[**breaking**] {% endif %}{{ commit.message | upper_first }} ([{{ commit.id | truncate(length=7, end="") }}](https://github.com/lainra/claude-code-telemetry/commit/{{ commit.id }}))
+    {%- endfor %}
+{% endfor %}\n
+"""
+# Changelog footer
+footer = """
+---
+Generated by [git-cliff](https://github.com/orhun/git-cliff)
+"""
+# Remove the leading and trailing whitespace from the template
+trim = true
+
+[git]
+# Parse conventional commits
+conventional_commits = true
+# Filter out the commits that are not conventional
+filter_unconventional = true
+# Process each line of a commit as an individual commit
+split_commits = false
+# Regex for parsing and grouping commits
+commit_parsers = [
+    { message = "^feat", group = "Features" },
+    { message = "^fix", group = "Bug Fixes" },
+    { message = "^doc", group = "Documentation" },
+    { message = "^perf", group = "Performance" },
+    { message = "^refactor", group = "Refactoring" },
+    { message = "^style", group = "Style" },
+    { message = "^test", group = "Testing" },
+    { message = "^chore\\(release\\): prepare for", skip = true },
+    { message = "^chore\\(deps.*\\)", skip = true },
+    { message = "^chore", group = "Miscellaneous Tasks" },
+    { body = ".*security", group = "Security" },
+]
+# Protect breaking changes from being skipped
+protect_breaking_commits = false
+# Filter out the commits that are not matched by commit parsers
+filter_commits = false
+# Sort commits by date
+sort_commits = "oldest"
+# Limit the number of commits to include in the changelog
+# limit_commits = 1000

.github/workflows/changelog.yml

@@ -0,0 +1,72 @@
+name: Changelog
+
+on:
+  push:
+    branches: [ main ]
+  workflow_dispatch:
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  changelog:
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push' || github.event_name == 'workflow_dispatch'
+    
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          
+      - name: Generate changelog
+        uses: orhun/git-cliff-action@v4
+        id: git-cliff
+        with:
+          config: .github/cliff.toml
+          args: --verbose
+        env:
+          OUTPUT: CHANGELOG.md
+          GITHUB_REPO: ${{ github.repository }}
+          
+      - name: Check if changelog was updated
+        id: git-diff
+        run: |
+          if git diff --exit-code CHANGELOG.md; then
+            echo "changed=false" >> $GITHUB_OUTPUT
+          else
+            echo "changed=true" >> $GITHUB_OUTPUT
+          fi
+          
+      - name: Create Pull Request
+        if: steps.git-diff.outputs.changed == 'true'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          # Configure git
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          
+          # Create branch and commit
+          BRANCH="update-changelog-$(date +%s)"
+          git checkout -b "$BRANCH"
+          git add CHANGELOG.md
+          git commit -m "chore: update CHANGELOG.md"
+          git push origin "$BRANCH"
+          
+          # Create PR using GitHub CLI
+          gh pr create \
+            --title "chore: update CHANGELOG.md" \
+            --body "## 📝 Automated Changelog Update
+          
+          This PR updates the CHANGELOG.md file with the latest commits.
+          
+          ### Changes Made:
+          - Updated CHANGELOG.md with recent commits
+          - Organized by conventional commit types
+          - Added links to commits and issues
+          
+          ---
+          *This PR was automatically generated by the changelog workflow.*" \
+            --base main \
+            --head "$BRANCH"

CHANGELOG.md

@@ -42,3 +42,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Revert
 
 - Use peter-evans/create-pull-request action ([16816c6](https://github.com/lainra/claude-code-telemetry/commit/16816c662854b63f8dc42719a11081bf07af4a32))
+
+---
+Generated by [git-cliff](https://github.com/orhun/git-cliff)