test: update pytest runner to also output coverage report #1714

ISSUE: #1714

CHANGELOG:
- [ ] Update the `pyproject.toml` configuration for pytest-cov to:
  - [ ] Accept no lower than 70% as coverage threshold.
  - [ ] Run tests with coverage reports generated in the console.

py/bin/run_tests

@@ -6,11 +6,11 @@ set -euo pipefail
 
 TOP_DIR=$(git rev-parse --show-toplevel)
 PYTHON_VERSIONS=(
-    "3.12"
-    "3.13"
+  "3.12"
+  "3.13"
 )
 
 for VERSION in "${PYTHON_VERSIONS[@]}"; do
-    echo "Running tests with Python ${VERSION}..."
-    uv run --python "python${VERSION}" --directory "${TOP_DIR}/py" pytest .
+  echo "Running tests with Python ${VERSION}..."
+  uv run --python "python${VERSION}" --directory "${TOP_DIR}/py" pytest .
 done

py/pyproject.toml

@@ -46,6 +46,9 @@ python_files = [
 ]
 testpaths = ["packages", "plugins", "samples"]
 
+[tool.pytest.ini_options]
+addopts = "--cov --cov-fail-under=70"
+
 # uv based package management.
 [tool.uv]
 default-groups = ["dev", "lint"]