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/app/models.py

@@ -0,0 +1,121 @@
+from __future__ import annotations
+
+from datetime import UTC, datetime
+from enum import StrEnum
+from typing import Any
+
+from sqlalchemy import (
+    JSON,
+    DateTime,
+    Float,
+    ForeignKey,
+    Integer,
+    String,
+)
+from sqlalchemy import (
+    Enum as SAEnum,
+)
+from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, relationship
+
+
+def utcnow() -> datetime:
+    return datetime.now(UTC)
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+class PositionSide(StrEnum):
+    LONG = "long"
+    SHORT = "short"
+
+
+class PositionStatus(StrEnum):
+    OPEN = "open"
+    CLOSED = "closed"
+
+
+class OrderSide(StrEnum):
+    BUY = "buy"
+    SELL = "sell"
+
+
+class StrategyConfig(Base):
+    __tablename__ = "strategy_configs"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    strategy_key: Mapped[str] = mapped_column(String(64), index=True)
+    symbol: Mapped[str] = mapped_column(String(32))
+    timeframe: Mapped[str] = mapped_column(String(16))
+    params: Mapped[dict[str, Any]] = mapped_column(JSON, default=dict)
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=utcnow)
+
+
+class Position(Base):
+    __tablename__ = "positions"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    strategy_key: Mapped[str] = mapped_column(String(64), index=True)
+    symbol: Mapped[str] = mapped_column(String(32), index=True)
+    side: Mapped[PositionSide] = mapped_column(SAEnum(PositionSide))
+    qty: Mapped[float] = mapped_column(Float)
+    entry_price: Mapped[float] = mapped_column(Float)
+    status: Mapped[PositionStatus] = mapped_column(
+        SAEnum(PositionStatus), default=PositionStatus.OPEN, index=True
+    )
+    stop_loss: Mapped[float | None] = mapped_column(Float, nullable=True)
+    take_profit: Mapped[float | None] = mapped_column(Float, nullable=True)
+    entry_fee: Mapped[float] = mapped_column(Float, default=0.0)
+    exit_price: Mapped[float | None] = mapped_column(Float, nullable=True)
+    exit_fee: Mapped[float] = mapped_column(Float, default=0.0)
+    realized_pnl: Mapped[float | None] = mapped_column(Float, nullable=True)
+    opened_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=utcnow)
+    closed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+
+    orders: Mapped[list[Order]] = relationship(back_populates="position")
+
+
+class Order(Base):
+    __tablename__ = "orders"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    position_id: Mapped[int | None] = mapped_column(
+        ForeignKey("positions.id"), nullable=True, index=True
+    )
+    strategy_key: Mapped[str] = mapped_column(String(64), index=True)
+    symbol: Mapped[str] = mapped_column(String(32))
+    side: Mapped[OrderSide] = mapped_column(SAEnum(OrderSide))
+    qty: Mapped[float] = mapped_column(Float)
+    price: Mapped[float] = mapped_column(Float)
+    fee: Mapped[float] = mapped_column(Float, default=0.0)
+    reason: Mapped[str] = mapped_column(String(255), default="")
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=utcnow, index=True
+    )
+
+    position: Mapped[Position | None] = relationship(back_populates="orders")
+
+
+class EquitySnapshot(Base):
+    __tablename__ = "equity_snapshots"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    equity: Mapped[float] = mapped_column(Float)
+    cash: Mapped[float] = mapped_column(Float)
+    price: Mapped[float] = mapped_column(Float)
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=utcnow, index=True
+    )
+
+
+class Event(Base):
+    __tablename__ = "events"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    level: Mapped[str] = mapped_column(String(16), default="info")
+    message: Mapped[str] = mapped_column(String(512))
+    strategy_key: Mapped[str | None] = mapped_column(String(64), nullable=True, index=True)
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=utcnow, index=True
+    )