chore: update test tooling (#75)

Reviewed-on: #75
Co-authored-by: Timo Behrendt <t.behrendt@t00n.de>
Co-committed-by: Timo Behrendt <t.behrendt@t00n.de>

.gitea/workflows/ci.yaml

@@ -10,7 +10,9 @@ env:
 jobs:
   test:
     name: test
-    runs-on: ubuntu-latest
+    runs-on:
+      - ubuntu-latest
+      - linux_amd64
     steps:
       - name: Checkout
         uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
@@ -42,3 +44,10 @@ jobs:
         run: make test
       - name: check:format
         run: make check-format
+      - name: Upload test-coverage
+        uses: ChristopherHX/gitea-upload-artifact@v4
+        with:
+          name: realdnydns-test-coverage
+          path: |
+            lcov.info
+          retention-days: 1