Test coverage on branch should be 100% (#1141)

Author: Kludex

.github/workflows/ci.yml

@@ -212,7 +212,7 @@ jobs:
           path: index.html
 
       - run: uv run coverage report --fail-under 95
-      - run: uv run diff-cover coverage.xml --fail-under 95
+      - run: uv run diff-cover coverage.xml --fail-under 100
 
   # https://github.com/marketplace/actions/alls-green#why used for branch protection checks
   check: