[25.1] Add Release Drafter GitHub Action integration

.github/release-drafter.yml

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+# Release Drafter Configuration for Galaxy
+# Implements YY.N.P versioning scheme using existing Galaxy labels
+#
+# IMPORTANT: Galaxy's versioning scheme is YY.N.P where:
+# - YY = Two-digit year (25 for 2025)
+# - N = Feature release number (0, 1, 2... - typically 2-3 per year)
+# - P = Patch/point release number (0, 1, 2, 3...)
+#
+# Year transitions (24→25) must be handled manually when creating releases.
+
+name-template: 'Galaxy $RESOLVED_VERSION'
+tag-template: 'v$RESOLVED_VERSION'
+
+# Categories for organizing release notes using existing Galaxy labels
+categories:
+  - title: '🎉 Major Changes'
+    labels:
+      - 'major'
+      - 'highlight'
+  - title: '🚀 New Features'
+    labels:
+      - 'kind/feature'
+  - title: '🔧 Enhancements'
+    labels:
+      - 'kind/enhancement'
+  - title: '🐛 Bug Fixes'
+    labels:
+      - 'kind/bug'
+  - title: '🔒 Security Updates'
+    labels:
+      - 'area/security'
+  - title: '⚡ Performance'
+    labels:
+      - 'area/performance'
+  - title: '🧰 Refactoring'
+    labels:
+      - 'kind/refactoring'
+  - title: '📚 Documentation'
+    labels:
+      - 'area/documentation'
+  - title: '🔧 Admin & Configuration'
+    labels:
+      - 'area/admin'
+      - 'area/configuration'
+  - title: '🛠️ API Changes'
+    labels:
+      - 'area/API'
+  - title: '🧪 Testing'
+    labels:
+      - 'area/testing'
+      - 'area/testing/api'
+      - 'area/testing/integration'
+      - 'area/testing/selenium'
+  - title: '🏗️ Infrastructure & Dependencies'
+    labels:
+      - 'area/dependencies'
+      - 'area/client-build'
+
+# Exclude certain labels from release notes
+exclude-labels:
+  - 'triage'
+  - 'procedures'
+  - 'planning'
+  - 'merge'
+  - 'status/needs feedback'
+  - 'status/planning'
+
+# Template for each change line
+change-template: '- $TITLE @$AUTHOR (#$NUMBER)'
+
+# Characters to escape in titles
+change-title-escapes: '\<*_&'
+
+# Version is read from lib/galaxy/version.py by the workflow
+# No version-resolver needed since Galaxy manages versions manually
+
+# Template for the release body
+template: |
+  ## Changes in $RESOLVED_VERSION
+
+  $CHANGES
+
+  **Full Changelog**: https://github.com/$OWNER/$REPOSITORY/compare/$PREVIOUS_TAG...v$RESOLVED_VERSION

.github/workflows/release-drafter.yml

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+name: Release Drafter
+
+on:
+  push:
+    branches:
+      - dev
+      - master
+      - 'release_*'
+  pull_request_target:
+    types: [opened, reopened, synchronize]
+
+permissions:
+  contents: read
+
+jobs:
+  update_release_draft:
+    permissions:
+      contents: write
+      pull-requests: write
+    if: github.repository == 'galaxyproject/galaxy'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: dev
+          sparse-checkout: |
+            lib/galaxy/version.py
+
+      - name: Read Galaxy version
+        id: galaxy-version
+        run: |
+          # Extract VERSION_MAJOR from version.py (e.g., "25.1")
+          VERSION_MAJOR=$(grep '^VERSION_MAJOR' lib/galaxy/version.py | cut -d'"' -f2)
+          RELEASE_VERSION="${VERSION_MAJOR}.0"
+          echo "version=${RELEASE_VERSION}" >> $GITHUB_OUTPUT
+          echo "Galaxy release version: ${RELEASE_VERSION}"
+
+      - uses: release-drafter/release-drafter@v6
+        with:
+          config-name: release-drafter.yml
+          version: ${{ steps.galaxy-version.outputs.version }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}