test: cover coordinate precision states

apps/api/tests/test_activity.py

@@ -131,6 +131,17 @@ def test_reports_without_coordinates_do_not_create_activity_group(db: Session) -
     assert activity_rows(db, hours=72, now=NOW) == []
 
 
+@pytest.mark.parametrize("precision", ["exact", "approximate", "area", "missing"])
+def test_coordinate_precision_is_preserved_in_activity_evidence(db: Session, precision: str) -> None:
+    report = add_report(db, age_hours=1)
+    report.raw_payload = {"provenance": {"coordinate_precision": precision}}
+    db.commit()
+
+    row = activity_rows(db, hours=24, now=NOW)[0]
+
+    assert row.coordinate_precision == precision
+
+
 def test_confidence_capped_at_50_with_single_player() -> None:
     """D06: One player cannot artificially inflate confidence above 50%."""
     engine = create_engine("sqlite://", connect_args={"check_same_thread": False}, poolclass=StaticPool)