Fix coverage badge: parse Cover column instead of Miss (#29)

* Add pytest test suite with coverage and CI workflow

* Fix ExecutionContext tests for FetchResponse return type

* Add tests for FetchResponse dataclass and headers

* Fix: preserve pytest exit code with pipefail in CI

* Add testing and coverage documentation to AGENTS.md, README.md, and RELEASING.md

* Add tests to reach 99% coverage: default config path, polling trigger validation, JSON parse fallback

* Add CI, PyPI, Python, and license badges to READMEs; add coverage badge support to CI

* Add coverage badge to READMEs

* Update gistID for coverage badge

* Include commit hash and message in coverage report title

* Add release notes step to RELEASING.md and action-error-demo sample to README

* Use actual PR head commit for coverage report title instead of merge commit

* Show commit message and author in coverage report title

* Use GitHub username for coverage title and always show coverage table

* Replace MishaKav action with custom flat coverage comment

* Fix coverage comment: write markdown to file to avoid backtick escaping issues

* Link commit SHA and missing line numbers in coverage comment

* Fix coverage parsing: use column 4 (Cover) not column 3 (Miss)

Author: TheRealAgentK

.github/workflows/tests.yml

@@ -56,7 +56,7 @@ jobs:
       - name: Build coverage comment
         id: coverage
         run: |
-          TOTAL=$(grep '^TOTAL' pytest-coverage.txt | awk '{print $(NF-1)}')
+          TOTAL=$(grep '^TOTAL' pytest-coverage.txt | awk '{print $4}')
           echo "total=${TOTAL}" >> "$GITHUB_OUTPUT"
 
           REPO_URL="${{ github.server_url }}/${{ github.repository }}"