RiskEngine.Application (risk_engine v0.1.0)

OTP application callback module.

Boots the supervision tree that backs the risk engine:

• Phoenix.PubSub (RiskEngine.PubSub) — the broadcast bus used by RiskEngine.RiskBroadcaster and RiskEngine.TradeIngestion to publish trades, risk snapshots, and alerts.
• Registry (RiskEngine.PortfolioRegistry) — maps a portfolio id to its running RiskEngine.Portfolio process, so callers only ever need to know a portfolio's id, never its pid.
• RiskEngine.PortfolioSupervisor — a DynamicSupervisor that starts a RiskEngine.Portfolio process on demand for each portfolio id seen.
• RiskEngine.Simulator — generates a steady stream of random trades so the system has data to react to without an external feed.

All children are supervised with a :one_for_one strategy: a crash in one is isolated from the others.