Add pygamma_n back to analysis3

.github/workflows/pixi-broken-package-check.yml

@@ -0,0 +1,53 @@
+name: Pixi Broken Package Check
+
+on:
+  pull_request:
+    branches:
+      - main
+    paths:
+      - 'environments/analysis3/pixi.toml'
+      - 'environments/analysis3/pixi.lock'
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  pixi-broken-package-check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          sparse-checkout: |
+            .github/workflows/pixi-broken-package-check.yml
+            environments/analysis3/pixi.toml
+            environments/analysis3/pixi.lock
+            scripts/check_broken_packages.py
+          sparse-checkout-cone-mode: false
+
+      - name: Generate broken package report
+        id: report
+        working-directory: ./environments/analysis3
+        env:
+          GITHUB_OUTPUT_PATH: /tmp/github-output.txt
+        run: |
+          python3 ../../scripts/check_broken_packages.py \
+            --pixi-toml pixi.toml \
+            --lockfile pixi.lock \
+            --markdown-output /tmp/broken-packages.md \
+            --github-output ${GITHUB_OUTPUT_PATH}
+          cat ${GITHUB_OUTPUT_PATH} >> "$GITHUB_OUTPUT"
+
+      - name: Comment broken package report on PR
+        if: always()
+        uses: access-nri/actions/.github/actions/comment@main
+        with:
+          number: ${{ github.event.pull_request.number }}
+          label: pixi-broken-package-check
+          message-file: /tmp/broken-packages.md
+
+      - name: Fail on broken package mismatch
+        if: steps.report.outputs.violations == 'true'
+        run: |
+          echo 'Broken-label packages in pixi.lock do not match pixi.toml declarations.'
+          exit 1