test: add coverage reporting

backend/README.md

@@ -1012,6 +1012,13 @@ cd backend
 $env:TEST_DATABASE_ENGINE='sqlite'; .\.venv\Scripts\python.exe -m pytest
 ```
 
+Run backend tests with coverage:
+
+```powershell
+cd backend
+$env:TEST_DATABASE_ENGINE='sqlite'; .\.venv\Scripts\python.exe -m pytest --cov --cov-report=term-missing
+```
+
 The test suite covers:
 
 - successful claim

backend/pyproject.toml

@@ -9,3 +9,25 @@ select = ["E", "W", "F", "I", "B", "C4", "UP", "DJ", "SIM"]
 "jobs/models.py" = ["DJ001"]
 "jobs/migrations/*.py" = ["E501"]
 "jobs/tests/*.py" = ["DJ001"]
+
+[tool.coverage.run]
+branch = true
+source = ["config", "jobs"]
+omit = [
+    "config/asgi.py",
+    "config/wsgi.py",
+    "jobs/management/*",
+    "*/migrations/*",
+    "*/tests/*",
+    "manage.py",
+]
+
+[tool.coverage.report]
+show_missing = true
+skip_covered = true
+fail_under = 60
+exclude_lines = [
+    "pragma: no cover",
+    "if __name__ == .__main__.:",
+    "raise NotImplementedError",
+]

backend/requirements.txt

@@ -7,4 +7,5 @@ psycopg[binary]>=3.2,<4.0
 django-unfold>=0.76,<1.0
 pytest>=8.0,<9.0
 pytest-django>=4.9,<5.0
+pytest-cov>=6.0,<7.0
 ruff>=0.15,<0.16