ci: collapse internal parity from 28 parallel jobs to single sequential job

Internal validator is pure Node.js — no .NET or Java needed. Running all
28 IGs in one job eliminates per-job overhead (runner startup, checkout,
npm ci, cache restore, zod-r4 build) and shares the FHIR package cache
across all IGs. Also removes the now-unnecessary merge-internal job.

Author: quotentiroler

.github/workflows/_parity-tests.yml

@@ -369,16 +369,11 @@ jobs:
             merged-output/hl7/badge-hl7-*.json
           retention-days: 30
 
-  # ── Internal (validate) — one job per IG ────────────────────────────
+  # ── Internal (validate) — single job, all IGs sequentially ──────────
   internal:
-    needs: setup
     runs-on: ubuntu-latest
     permissions:
       contents: read
-    strategy:
-      fail-fast: false
-      matrix:
-        package: ${{ fromJson(needs.setup.outputs.matrix) }}
 
     steps:
       - name: Checkout code
@@ -397,7 +392,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: .cache/.fhir/packages
-          key: fhir-packages-${{ matrix.package }}-${{ hashFiles('src/test/pipelineParity.test.ts', 'src/generator/**/*.ts', 'src/generator/fhir/**/*.json') }}-v8
+          key: fhir-packages-all-${{ hashFiles('src/test/pipelineParity.test.ts', 'src/generator/**/*.ts', 'src/generator/fhir/**/*.json') }}-v8
 
       - name: Cache tx-server ValueSet expansions
         uses: actions/cache@v4
@@ -428,69 +423,38 @@ jobs:
             find .cache/.fhir/packages -type d -name "generated" -exec rm -rf {} + 2>/dev/null || true
           fi
 
-      - name: Run internal parity test (${{ matrix.package }})
+      - name: Run internal parity tests (all packages)
         id: internal-test
         run: npm run test:parity
         env:
           CI: true
-          PIPELINE_PACKAGES: ${{ matrix.package }}
+          PIPELINE_PACKAGES: ${{ inputs.packages }}
           FHIR_VALIDATOR: internal
         continue-on-error: true
 
-      - name: Upload per-IG internal report
+      - name: Generate internal badges
+        if: always()
+        run: |
+          if [ -f "test/pipeline-parity-report/SUMMARY.md" ]; then
+            node scripts/generate-badges.js test/pipeline-parity-report/SUMMARY.md test/pipeline-parity-report --validator=internal
+          fi
+
+      - name: Upload internal reports
         if: always()
         uses: actions/upload-artifact@v4
         with:
-          name: internal-report-${{ matrix.package }}
+          name: internal-reports
           path: |
             test/pipeline-parity-report/SUMMARY.md
             test/pipeline-parity-report/*-DETAIL.md
-            test/pipeline-parity-report/${{ matrix.package }}-*.json
-            test/pipeline-parity-report/${{ matrix.package }}-*.txt
+            test/pipeline-parity-report/*-*.json
+            test/pipeline-parity-report/*-*.txt
+            test/pipeline-parity-report/parity-data-internal.json
+            test/pipeline-parity-report/badge-internal-*.json
           retention-days: 30
 
       - name: Fail if test failed
         if: steps.internal-test.outcome == 'failure'
         run: |
-          echo "::error::Internal parity test failed for ${{ matrix.package }}"
+          echo "::error::Internal parity tests failed"
           exit 1
-
-  # ── Merge Internal reports ─────────────────────────────────────────────────
-  merge-internal:
-    needs: [setup, internal]
-    if: always()
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
-        with:
-          node-version: '22'
-      - name: Install dependencies
-        run: npm ci || (npm cache clean --force && npm ci)
-
-      - name: Download all internal per-IG reports
-        uses: actions/download-artifact@v4
-        with:
-          pattern: internal-report-*
-          path: merged-input/internal
-          merge-multiple: false
-
-      - name: Merge internal reports
-        run: node scripts/merge-parity-reports.js merged-input/internal merged-output/internal
-
-      - name: Generate internal badges
-        run: |
-          if [ -f "merged-output/internal/SUMMARY.md" ]; then
-            node scripts/generate-badges.js merged-output/internal/SUMMARY.md merged-output/internal --validator=internal
-          fi
-
-      - name: Upload merged internal reports
-        uses: actions/upload-artifact@v4
-        with:
-          name: internal-reports
-          path: |
-            merged-output/internal/SUMMARY.md
-            merged-output/internal/*-DETAIL.md
-            merged-output/internal/parity-data-internal.json
-            merged-output/internal/badge-internal-*.json
-          retention-days: 30