Socket server

Source: src/sockets/socket-manager.ts

Initialization

initializeSocket(io) registers connection handler on the shared Socket.IO Server instance created in app.ts.

Clients connect with query param userId:

query: { userId }

Server maintains userSocketMap: Map<userId, socketId[]> for targeted emits (e.g. profile updates).

Registrar	Emitter source
`registerOrderListeners()`	`order.emitter`
`registerIndexSettingListeners()`	`indexSetting.emitter`
`registerMarketDataListeners()`	`marketData.emitter`
`registerUserSettingListeners()`	`userSetting.emitter`

Called during app bootstrap after Mongo connects.

Export	Purpose
`getIoInstance()`	Access io for direct emit (event processor)
`getSocketIdByUserId()`	Lookup socket ids
`latestDataMap`	In-memory tick cache
`indexSettingData`	Cached settings snapshot