pyproject, .github/workflows, .gitignore: align with fleet coverage convention

Two related cleanups, applied per the fleet sweep brief
(unpythonic/briefs/fleet-sweep-coverage-and-deps.md):

- Add [tool.coverage.run] to pyproject.toml: source = ["pyan"] and
  omit = ["*/tests/*"], so coverage reports cover only production code.
  Test files are excluded from analysis because pytest already reports
  pass/fail per test — coverage of tests just adds rows without insight.

- Switch the coverage and CI workflows from ad-hoc `pip install pytest
  pytest-cov sphinx docutils && pip install -e .` to `pip install pdm
  && pdm install`. All four packages are already declared in
  [dependency-groups].dev, so `pdm install` covers them in one shot
  (default behavior includes the dev group), and a fresh `pdm install`
  on a developer's machine now matches what CI runs.

Subsequent pytest/ruff invocations gain a `pdm run` prefix, since
`pdm install` lands the binaries under `.venv/bin/` rather than on
PATH.

Also gitignore coverage.xml — already generated locally by the
verify recipe, and a CI artifact uploaded to Codecov but not meant
for the repo.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: Technologicat

.github/workflows/ci.yml

@@ -36,14 +36,14 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install ruff pytest pytest-cov sphinx docutils
-        pip install -e .
+        pip install pdm
+        pdm install
     - name: Lint with ruff
       run: |
-        ruff check .
+        pdm run ruff check .
     - name: Test with pytest
       run: |
-        pytest tests/ -v
+        pdm run pytest tests/ -v
 
   build:
     needs: test

.github/workflows/coverage.yml

@@ -22,11 +22,11 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install pytest pytest-cov sphinx docutils
-        pip install -e .
+        pip install pdm
+        pdm install
     - name: Generate coverage report
       run: |
-        pytest tests/ -v --cov-branch --cov-report=xml:coverage.xml
+        pdm run pytest tests/ -v --cov-branch --cov-report=xml:coverage.xml
     - name: Upload coverage reports to Codecov
       uses: codecov/codecov-action@v6
       with:

.gitignore

@@ -13,6 +13,7 @@ MANIFEST
 *.mypy_cache
 .python-version
 .coverage
+coverage.xml
 htmlcov/
 00_tmp/
 *.zip

pyproject.toml

@@ -102,6 +102,16 @@ log_format = "%(asctime)s %(levelname)s %(message)s"
 log_date_format = "%Y-%m-%d %H:%M:%S"
 cache_dir = ".cache"
 
+[tool.coverage.run]
+# Coverage signal is about which lines of *production code* run.
+# pytest already reports pass/fail/error per test, so coverage of
+# the test files themselves would just add rows to the report
+# without insight. Excluded via the omit glob below.
+source = ["pyan"]
+omit = [
+    "*/tests/*",
+]
+
 [tool.ruff]
 line-length = 120
 target-version = "py310"