adding data-services

libs/event-bus/README.md

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+# Event Bus Library
+
+A Redis-based event bus implementation for inter-service communication in the stock-bot project.
+
+## Features
+
+- Publish/subscribe pattern for asynchronous messaging
+- Support for typed events based on `@stock-bot/shared-types`
+- Reliable message delivery
+- Channel-based subscriptions
+
+## Usage
+
+```typescript
+import { createEventBus } from '@stock-bot/event-bus';
+import { MarketDataEvent } from '@stock-bot/shared-types';
+
+// Create an event bus instance
+const eventBus = createEventBus({
+  redisHost: 'localhost',
+  redisPort: 6379
+});
+
+// Subscribe to market data events
+eventBus.subscribe('market.data', async (event: MarketDataEvent) => {
+  console.log(`Received price update for ${event.data.symbol}: ${event.data.price}`);
+});
+
+// Publish an event
+await eventBus.publish('market.data', {
+  type: 'MARKET_DATA',
+  data: {
+    symbol: 'AAPL',
+    price: 150.25,
+    bid: 150.20,
+    ask: 150.30,
+    volume: 1000000,
+    timestamp: new Date()
+  },
+  timestamp: new Date()
+});
+```