ci: Enable code coverage

.codecov.yaml

@@ -0,0 +1,9 @@
+coverage:
+  status:
+    project:
+      default:
+        # Do not pass if PR reduces coverage by more than 5%
+        target: auto
+        threshold: 5
+comment:
+  layout: "header, diff, components, files, footer"

.config/nextest.toml

@@ -0,0 +1,6 @@
+[profile.ci]
+fail-fast = false
+[profile.ci.junit]
+path = "junit.xml"
+store-success-output = true
+store-failure-output = true

.github/workflows/rust-workflow.yml

@@ -20,5 +20,5 @@ env:
 # Defined CI jobs.
 jobs:
   check:
-    uses: famedly/backend-build-workflows/.github/workflows/rust-workflow.yml@main
+    uses: famedly/backend-build-workflows/.github/workflows/rust-workflow.yml@v1
     secrets: inherit