feat(ci): add Codecov, CodeQL, changelog enforcement, bench gating

.github/workflows/ci.yml

@@ -7,7 +7,26 @@ on:
   pull_request:
     branches: [main, develop]
 
+permissions:
+  contents: read
+
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
+  dependency-review:
+    if: github.event_name == 'pull_request'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/dependency-review-action@v4
+        with:
+          fail-on-severity: high
+
   audit:
     runs-on: ubuntu-latest
     steps:
@@ -50,9 +69,19 @@ jobs:
           else
             npm run test:coverage
           fi
+      - name: Upload coverage
+        if: matrix.node-version == 22
+        uses: codecov/codecov-action@v5
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          fail_ci_if_error: false
+      - name: Coverage report on PR
+        if: matrix.node-version == 22 && github.event_name == 'pull_request'
+        uses: davelosert/vitest-coverage-report-action@v2
       - run: npx tsc --noEmit
 
   bench:
+    needs: [test]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
@@ -76,7 +105,7 @@ jobs:
         run: npm run test:e2e
 
   publish:
-    needs: [audit, lint, test, e2e]
+    needs: [audit, lint, test, bench, e2e]
     if: startsWith(github.ref, 'refs/tags/v')
     runs-on: ubuntu-latest
     permissions:
@@ -100,9 +129,15 @@ jobs:
             exit 1
           fi
 
+      - name: Validate changelog entry
+        run: |
+          TAG_VERSION="${GITHUB_REF_NAME#v}"
+          if ! grep -q "## \[${TAG_VERSION}\]" CHANGELOG.md; then
+            echo "::error::No CHANGELOG.md entry found for version ${TAG_VERSION}"
+            exit 1
+          fi
+
       - run: npm publish --provenance --access public
-        env:
-          NODE_AUTH_TOKEN: ${{ secrets.NODE_AUTH_TOKEN }}
 
       - name: Extract release notes
         id: release_notes

.github/workflows/codeql.yml

@@ -0,0 +1,27 @@
+name: CodeQL
+
+on:
+  push:
+    branches: [main, develop]
+  pull_request:
+    branches: [main, develop]
+  schedule:
+    - cron: '0 6 * * 1'
+
+jobs:
+  analyze:
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: javascript-typescript
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3