Fix concurrent map read/write race condition in MarketData

Add sync.RWMutex to protect future and spot price maps accessed by
WebSocket handlers (writers) and Telegram bot handlers (readers).
Also adds Alpha token support with caching.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

internal/data/market/main.go

@@ -1,13 +1,24 @@
 package market
 
-import "github.com/rs/zerolog/log"
+import (
+	"sync"
+	"time"
+
+	"github.com/rs/zerolog/log"
+)
 
 type MarketData struct {
+	mu                    sync.RWMutex
 	futureMarkPrice       map[string]float64
 	futureFundingRate     map[string]float64
 	futureNextFundingTime map[string]int64
 
 	spotPrice map[string]float64
+
+	// Alpha token cache
+	alphaTokens          map[string]AlphaTokenInfo
+	alphaCacheMutex      sync.RWMutex
+	lastAlphaCacheUpdate time.Time
 }
 
 func NewMarketData() *MarketData {
@@ -17,9 +28,14 @@ func NewMarketData() *MarketData {
 		futureFundingRate:     make(map[string]float64),
 		futureNextFundingTime: make(map[string]int64),
 
-		spotPrice: make(map[string]float64),
+		spotPrice:   make(map[string]float64),
+		alphaTokens: make(map[string]AlphaTokenInfo),
 	}
 	_ = ms.StartFutureWsMarkPrice()
 	_ = ms.StartSpotWsMarkPrice()
+	
+	// Initialize Alpha token cache
+	go ms.refreshAlphaTokenCache()
+	
 	return ms
 }