feat(ws): implement WebSocket cluster mode with Redis Pub/Sub

Introduce a new WebSocket messaging architecture that supports both standalone and cluster modes. This allows for horizontal scaling of WebSocket servers by using Redis Pub/Sub to synchronize messages across multiple instances.

Key changes:
- Added `ws.MessagePublisher` interface to abstract message distribution.
- Implemented `ws.Bus` to handle cluster-mode messaging via Redis.
- Added `ws.OnlineTracker` to manage user online status across the cluster.
- Refactored multiple services (Chat, Group, Push, Call, etc.) to use the new `MessagePublisher` instead of a concrete `ws.Hub`.
- Added WebSocket configuration options (mode, instance ID, channel, TTL, heartbeat) to `config.yaml` and `config.go`.
- Updated dependency injection with Wire to support the new publisher and Redis client.
- Improved logging by replacing standard `log` with `zap` in several service components.

internal/service/push_service.go

@@ -82,7 +82,7 @@ type pushServiceImpl struct {
 	pushRepo    repository.PushRecordRepository
 	deviceRepo  repository.DeviceTokenRepository
 	messageRepo repository.MessageRepository
-	wsHub       *ws.Hub
+	wsHub       ws.MessagePublisher
 	jpushClient *jpush.Client
 
 	pushQueue chan *pushTask
@@ -102,14 +102,14 @@ func NewPushService(
 	pushRepo repository.PushRecordRepository,
 	deviceRepo repository.DeviceTokenRepository,
 	messageRepo repository.MessageRepository,
-	wsHub *ws.Hub,
+	publisher ws.MessagePublisher,
 	jpushClient *jpush.Client,
 ) PushService {
 	return &pushServiceImpl{
 		pushRepo:    pushRepo,
 		deviceRepo:  deviceRepo,
 		messageRepo: messageRepo,
-		wsHub:       wsHub,
+		wsHub:       publisher,
 		jpushClient: jpushClient,
 		pushQueue:   make(chan *pushTask, PushQueueSize),
 		stopChan:    make(chan struct{}),