Implement initial data load

[ferdn4ndo]

The objective is develop a flow to retrieve initial data from exchange and save on database. Creates:

• Exchange client to request exchange API
• Exchange service to persist data
• Consumer service to handle client and service

This consumer have two main functions:

• Load initial exchange data, with exchange info(name for now), supported currencies and supported pairs
• Retrieve complete candlestick historic for a given pair

An example on how to consume crated classes:

import os

from app.clients.binance.binance_client import BinanceClient
from app.services.consumer_service import ConsumerService
from app.services.exchanges.binance_exchange_service import BinanceExchangeService
from sqlalchemy import create_engine
from sqlalchemy.orm import Session, sessionmaker

engine = create_engine(os.getenv("DATABASE_URL"))
Session = sessionmaker(bind=engine)
session = Session()

client = BinanceClient()
service = BinanceExchangeService(session)

consumer = ConsumerService(client, service)
consumer.populate_exchange_data()
consumer.populate_candlesticks("BTCUSDT")