Add channel material and downtime analytics

tests/test_material_efficiency_persistence.py

@@ -48,10 +48,10 @@ SETTINGS = PostgresSettings("localhost", 5432, "analytics", "writer", "secret")
 
 
 @pytest.fixture
-def storage(monkeypatch):
-    # Real schema and INSERT semantics, with only driver transport adapted for SQLite.
+def storage(monkeypatch, sqlite_schema):
+    # Production schema and INSERT semantics, adapted for the SQLite dialect/transport.
     database = sqlite3.connect(":memory:")
-    database.executescript(Path("db/schema.sql").read_text())
+    database.executescript(sqlite_schema)
     connection = MagicMock()
 
     def execute(sql, params):