Build 060.27: implement Persistent Market Data Storage

app/tests/unit/bootstrap/test_app_factory.py

@@ -46,6 +46,7 @@ def make_settings() -> SimpleNamespace:
         exchange_name="dzengi",
         default_symbol="BTC/USD_LEVERAGE",
         trade_stream=SimpleNamespace(enabled=True),
+        market_data_storage=SimpleNamespace(enabled=True),
     )
 
 
@@ -56,6 +57,12 @@ def test_create_app_builds_one_application_composition(
     bot = object()
     dispatcher = object()
     runtime = object()
+    storage_lifecycle = object()
+    storage_sink = object()
+    storage = SimpleNamespace(
+        lifecycle=storage_lifecycle,
+        trade_observation_sink=storage_sink,
+    )
     journal = RecordingJournal()
     observed_runtime_settings: list[object] = []
     registered_bots: list[object] = []
@@ -82,8 +89,23 @@ def test_create_app_builds_one_application_composition(
         lambda: journal,
     )
 
-    def build_runtime(received_settings: object) -> object:
+    monkeypatch.setattr(
+        app_factory,
+        "build_market_data_storage",
+        lambda received_settings: (
+            storage
+            if received_settings is settings
+            else None
+        ),
+    )
+
+    def build_runtime(
+        received_settings: object,
+        *,
+        trade_observation_sink: object,
+    ) -> object:
         observed_runtime_settings.append(received_settings)
+        assert trade_observation_sink is storage_sink
         return runtime
 
     monkeypatch.setattr(
@@ -118,10 +140,18 @@ def test_create_app_builds_one_application_composition(
     assert application.bot is bot
     assert application.dispatcher is dispatcher
     assert application.trade_stream_runtime is runtime
+    assert (
+        application.market_data_storage_lifecycle
+        is storage_lifecycle
+    )
     assert observed_runtime_settings == [settings]
     assert registered_bots == [bot]
     assert routed_dispatchers == [dispatcher]
     assert journal.info_calls[0][2]["trade_stream_enabled"] is True
+    assert (
+        journal.info_calls[0][2]["market_data_storage_enabled"]
+        is True
+    )
 
 
 def test_runtime_build_error_is_fatal(
@@ -149,9 +179,18 @@ def test_runtime_build_error_is_fatal(
         "JournalService",
         RecordingJournal,
     )
+    monkeypatch.setattr(
+        app_factory,
+        "build_market_data_storage",
+        lambda settings: None,
+    )
 
-    def fail_runtime_build(settings: object) -> None:
-        del settings
+    def fail_runtime_build(
+        settings: object,
+        *,
+        trade_observation_sink: object,
+    ) -> None:
+        del settings, trade_observation_sink
         raise expected
 
     monkeypatch.setattr(