chore: update release workflow

Author: zepfred

.github/workflows/release.yml .github/workflows/release-1.x.yml.github/workflows/release.yml renamed to .github/workflows/release-1.x.yml

@@ -9,7 +9,7 @@
 # Should any of these axioms change, the release pipeline will need to be (significantly) refactored.
 # 0.8.x releases existed before this pipeline; they are done differently, similarities are coincidental.
 
-name: Release
+name: Release Community 1.x to Maven Central
 on:
   workflow_dispatch:
     inputs:
@@ -21,9 +21,10 @@ on:
         default: 1.x
         required: true
       dryRun:
-        description: 'Do a dry run? (true or false)'
+        description: 'Do a dry run?'
         default: true
         required: true
+        type: boolean
 jobs:
   build:
     env:
@@ -32,10 +33,23 @@ jobs:
     runs-on: self-hosted
     permissions:
       contents: write  # IMPORTANT: required for action to create release branch
-      pull-requests: write # IMPORTANT: so release PR can be created
       id-token: write  # IMPORTANT: mandatory for trusted publishing
       attestations: write  # IMPORTANT: mandatory for attestations
     steps:
+      - name: Print inputs to the release workflow
+        run: echo "${{ toJSON(github.event.inputs) }}"
+
+      - name: Validate the version
+        shell: bash
+        env:
+          VERSION: ${{ github.event.inputs.version }}
+        run: |
+          version="$VERSION"
+          if [[ "$version" != 1.* ]]; then
+            echo "The version input '$version' is invalid. This workflow only supports versions starting with '1.'."
+            exit 1
+          fi
+
       - name: Checkout timefold-solver
         uses: actions/checkout@v6
         with:
@@ -62,9 +76,12 @@ jobs:
       # Technically, this goes against the main reason for doing a dry run; to eliminate potential problems.
       # But unless something catastrophic happened, PR checks on source branch already ensured that all tests pass.
       - name: Set release version and build release
+        env:
+          NEW_VERSION: ${{ inputs.version }}
+          DRY_RUN: ${{ inputs.dryRun }}
         run: |
-          ./mvnw -Dfull versions:set -DnewVersion=${{ github.event.inputs.version }}
-          ./mvnw -Dfull deploy -DskipTests=${{ github.event.inputs.dryRun }} -DaltDeploymentRepository=local::default::file://`pwd`/target/staging-deploy
+          ./mvnw -Dfull versions:set -DnewVersion="$NEW_VERSION" -DgenerateBackupPoms=false
+          ./mvnw -Dfull deploy -DskipTests=$DRY_RUN -DaltDeploymentRepository=local::default::file://`pwd`/target/staging-deploy
           cp docs/target/antora.yml docs/src/antora.yml
           git add docs/src/antora.yml
           find . -name 'pom.xml' | xargs git add