Add CD fingerprint, fix quality report usage, consistent test naming

- Add cds_fingerprint.json (436 CDs, 107 targets, 55 areas with
  violations, 69 violated targets, max 0.50%)
- Fix quality_report.py usage docstring to show --scope states
- Rename test classes to TestStatesFingerprint/TestCdsFingerprint
  so pytest -k states and pytest -k cds work consistently

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: donboyd5

tests/test_fingerprint.py

@@ -216,7 +216,7 @@ def _run_detail_test(scope, areas, weight_dir, update):
     not _has_weight_files(STATE_WEIGHT_DIR, ALL_STATES),
     reason="No state weight files — run solve_weights first",
 )
-class TestStateFingerprint:
+class TestStatesFingerprint:
     """Fingerprint tests for state weights."""
 
     # pylint: disable=redefined-outer-name
@@ -240,14 +240,14 @@ def test_state_per_area_sums_match(self, update_mode):
     not _has_weight_files(CD_WEIGHT_DIR, _CD_AREAS),
     reason="No CD weight files — run solve_weights --scope cds first",
 )
-class TestCDFingerprint:
+class TestCdsFingerprint:
     """Fingerprint tests for congressional district weights."""
 
     # pylint: disable=redefined-outer-name
-    def test_cd_weights_match_reference(self, update_mode):
+    def test_cds_weights_match_reference(self, update_mode):
         """Compare weight integer sums against saved reference."""
         _run_fingerprint_test("cds", _CD_AREAS, CD_WEIGHT_DIR, update_mode)
 
-    def test_cd_per_area_sums_match(self, update_mode):
+    def test_cds_per_area_sums_match(self, update_mode):
         """Identify which CDs changed."""
         _run_detail_test("cds", _CD_AREAS, CD_WEIGHT_DIR, update_mode)

tmd/areas/Makefile

@@ -11,6 +11,7 @@
 # Override worker count: make -C tmd/areas cds WORKERS=16
 
 WORKERS ?= 8
+ROOT := $(realpath $(CURDIR)/../..)
 
 # --- State pipeline ---
 
@@ -26,8 +27,8 @@ state-weights: state-targets
 	python -m tmd.areas.solve_weights --scope states --workers $(WORKERS)
 
 states: state-weights
-	python -m pytest tests/test_prepare_targets.py -v -k "not CD"
-	python -m pytest tests/test_state_weight_results.py -v
+	python -m pytest $(ROOT)/tests/test_prepare_targets.py -v -k "not CD"
+	python -m pytest $(ROOT)/tests/test_state_weight_results.py -v
 	python -m tmd.areas.quality_report --scope states
 
 # --- Congressional district pipeline ---
@@ -44,5 +45,5 @@ cd-weights: cd-targets
 	python -m tmd.areas.solve_weights --scope cds --workers $(WORKERS)
 
 cds: cd-weights
-	python -m pytest tests/test_prepare_targets.py -v -k CD
+	python -m pytest $(ROOT)/tests/test_prepare_targets.py -v -k CD
 	python -m tmd.areas.quality_report --scope cds