build: add ArchUnit, JaCoCo, Spotless, SpotBugs, Error Prone/NullAway, forbidden-apis, CPD, dependency-analysis

.github/workflows/build.yml

@@ -55,8 +55,19 @@ jobs:
         with:
           distribution: temurin
           java-version: 21
-      - name: Full build
+      - name: Full build (checkstyle, PMD, spotless, spotbugs, forbidden-apis, CPD, tests, coverage)
         run: ./gradlew --no-daemon build
+      - name: Upload quality reports
+        if: always()
+        uses: actions/upload-artifact@v5
+        with:
+          name: quality-reports
+          path: |
+            build/reports/spotbugs
+            build/reports/cpd
+            build/reports/jacoco
+            build/reports/checkstyle
+            build/reports/pmd
       - name: Upload default jar
         uses: actions/upload-artifact@v5
         with: