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Replace raw asyncpg SQL with SQLAlchemy async engine, async_sessionmaker,
and ORM operations. Uses session.merge for candle upserts, session.add
for signal/order inserts, update() for status changes, select() for
queries. Auto-converts postgresql:// URLs to postgresql+asyncpg://.
Keeps init_tables() as backward-compatible alias for connect().
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Add SA 2.0 declarative models (CandleRow, SignalRow, OrderRow, TradeRow,
PositionRow, PortfolioSnapshotRow) mirroring existing asyncpg tables.
Set up Alembic with async PostgreSQL support and add migrate/migrate-down/
migrate-new Makefile targets. Update shared dependencies with sqlalchemy,
alembic, structlog, prometheus-client, pyyaml, aiohttp, and rich.
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Binance spot crypto trading platform with microservices architecture:
- shared: Pydantic models, Redis Streams broker, asyncpg DB layer
- data-collector: Binance WebSocket/REST market data collection
- strategy-engine: Plugin-based strategy execution (RSI, Grid)
- order-executor: Order execution with risk management
- portfolio-manager: Position tracking and PnL calculation
- backtester: Historical strategy testing with simulator
- cli: Click-based CLI for all operations
- Docker Compose orchestration with Redis and PostgreSQL
- 24 test files covering all modules
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