ci: refine build, benchmark, and Pages workflows

* add workflow-level concurrency control for benchmark and Pages pipelines
* keep release changelog generation and the separate distZip step in the build workflow by design
* align the benchmark workflow with the primary Gradle action setup
* add Gradle wrapper validation to benchmark runs
* switch benchmark caching and setup to gradle/actions/setup-gradle
* remove the redundant Gradle wrapper executable-bit adjustment
* keep benchmark generation in Pages unchanged while improving workflow control

.github/workflows/benchmarks.yml

@@ -19,6 +19,10 @@ on:
       - 'gradlew.bat'
       - '.github/workflows/benchmarks.yml'
 
+concurrency:
+  group: benchmarks-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   jmh:
     runs-on: ubuntu-latest
@@ -31,15 +35,17 @@ jobs:
       - name: Check out sources
         uses: actions/checkout@v4
 
+      - name: Validate Gradle wrapper
+        uses: gradle/actions/wrapper-validation@v4
+
       - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: '21'
-          cache: gradle
 
-      - name: Make Gradle executable
+      - name: Set up Gradle caching and instrumentation
-        run: chmod +x ./gradlew
+        uses: gradle/actions/setup-gradle@v4
 
       - name: Verify reproducibility inputs
         shell: bash

.github/workflows/build.yml

@@ -156,15 +156,6 @@ jobs:
           test -f gradle.properties
           test -f gradle/verification-metadata.xml
 
-      - name: Generate release changelog for tagged builds
-        if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/release@')
-        shell: bash
-        run: |
-          set -euo pipefail
-          chmod +x ./tools/generate-release-notes.sh
-          mkdir -p build/generated/release-notes
-          ./tools/generate-release-notes.sh "${GITHUB_REF_NAME}" > build/generated/release-notes/CHANGELOG.md
-
       - name: Build release inputs, signed Maven bundle, and SBOM
         env:
           SIGNING_KEY: ${{ secrets.SIGNING_KEY }}

.github/workflows/pages.yml

@@ -19,6 +19,7 @@ on:
       - 'gradlew'
       - 'gradlew.bat'
       - '.github/workflows/pages.yml'
+      - '.github/workflows/benchmarks.yml'
       - 'tools/generate-pages-badges.py'
   workflow_dispatch: