Crypto trading bot: engine, brokers, backtester, dashboard, deploy

FastAPI backend with a single-strategy async engine, paper and Binance
brokers, pure-python indicators, a backtester that shares the engine's
portfolio math, and a Vue dashboard with a live WebSocket feed. Adds the
Gitea Actions CI/CD workflow that deploys to Traefik via docker_default.

backend/tests/conftest.py

@@ -0,0 +1,63 @@
+# ruff: noqa: E402, I001
+from __future__ import annotations
+
+import os
+
+os.environ["DATABASE_URL"] = "sqlite:///./data/test_trader.db"
+os.environ["FEE_BPS"] = "0"
+os.environ["SLIPPAGE_BPS"] = "0"
+os.environ["POLL_INTERVAL"] = "3600"
+os.environ["STARTING_BALANCE"] = "10000"
+
+from collections.abc import Iterator  # noqa: E402
+
+import pytest  # noqa: E402
+
+from app.broker.paper import PaperBroker  # noqa: E402
+from app.config import Settings  # noqa: E402
+from app.market.fake import FakeMarketData  # noqa: E402
+from app.models import Base  # noqa: E402
+from app.db import engine as db_engine  # noqa: E402
+from app.runtime import Runtime  # noqa: E402
+from app.store import Store  # noqa: E402
+
+
+@pytest.fixture
+def settings() -> Settings:
+    return Settings(
+        mode="paper",
+        symbol="BTC/USDT",
+        timeframe="1m",
+        poll_interval=3600,
+        starting_balance=10_000,
+        fee_bps=0,
+        slippage_bps=0,
+    )
+
+
+@pytest.fixture(autouse=True)
+def clean_db() -> Iterator[None]:
+    Base.metadata.drop_all(bind=db_engine)
+    Base.metadata.create_all(bind=db_engine)
+    yield
+    Base.metadata.drop_all(bind=db_engine)
+
+
+@pytest.fixture
+def store() -> Store:
+    return Store()
+
+
+@pytest.fixture
+def market() -> FakeMarketData:
+    return FakeMarketData.from_closes([100.0, 101.0, 102.0])
+
+
+@pytest.fixture
+def runtime(settings: Settings, store: Store, market: FakeMarketData) -> Runtime:
+    return Runtime(
+        settings,
+        store,
+        feed_factory=lambda _settings: market,
+        broker_factory=lambda _settings: PaperBroker(fee_bps=0, slippage_bps=0),
+    )