finally have the coverage correct

.github/workflows/test_coverage.yml

@@ -0,0 +1,30 @@
+name: Test Coverage
+
+on:
+  push:
+    branches: [ develop ]
+  pull_request:
+    branches: [ main, develop ]
+
+jobs:
+  run-ci:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Initialize Python
+        uses: actions/[email protected]
+        with:
+          python-version: '3.12'
+
+      - name: Install package
+        run: |
+          python3 -m pip install --editable .[test,docs]
+
+      - name: Run pytest tests
+        run: |
+          pytest
+
+      - name: Run coverage
+        run: |
+          pytest --cov=phenopacket_mapper