feat(runner): implement cluster mode with Redis-based task dispatching and registry

Introduce a distributed task execution system for gRPC runners. This includes:
- A `TaskBus` for cluster-mode task dispatching via Redis Pub/Sub.
- A `RunnerRegistry` to track active runner instances in Redis.
- Support for both standalone and cluster modes via configuration.
- Refactored `RunnerHub` and `TaskManager` to use a `TaskDispatcher` interface, decoupling task submission from local execution.
- Added distributed locking to `HotRankWorker` to ensure only one instance performs periodic hot rank recalculations in a multi-instance deployment.
- Updated dependency injection (Wire) to support the new runner components and registry.

internal/config/config.go

@@ -33,6 +33,7 @@ type Config struct {
 	JPush             JPushConfig             `mapstructure:"jpush"`
 	SetupSecret       string                  `mapstructure:"setup_secret"`
 	WebSocket         WSConfig                `mapstructure:"websocket"`
+	Runner            RunnerConfig            `mapstructure:"runner"`
 }
 
 // Load 加载配置文件
@@ -180,6 +181,15 @@ func Load(configPath string) (*Config, error) {
 	viper.SetDefault("websocket.cluster.msg_channel", "ws:msg")
 	viper.SetDefault("websocket.cluster.online_ttl", 60)
 	viper.SetDefault("websocket.cluster.heartbeat_interval", 20)
+	// Runner 集群默认值（mode 和 instance_id 空则跟随 websocket）
+	viper.SetDefault("runner.mode", "")
+	viper.SetDefault("runner.cluster.instance_id", "")
+	viper.SetDefault("runner.cluster.task_channel", "runner:task")
+	viper.SetDefault("runner.cluster.result_channel", "runner:result")
+	viper.SetDefault("runner.cluster.registry_prefix", "runner:reg:")
+	viper.SetDefault("runner.cluster.cap_prefix", "runner:cap:")
+	viper.SetDefault("runner.cluster.registry_ttl", 90)
+	viper.SetDefault("runner.cluster.heartbeat_interval", 30)
 
 	if err := viper.ReadInConfig(); err != nil {
 		return nil, fmt.Errorf("failed to read config: %w", err)
@@ -190,6 +200,9 @@ func Load(configPath string) (*Config, error) {
 		return nil, fmt.Errorf("failed to unmarshal config: %w", err)
 	}
 
+	// Runner mode 和 instance_id 空则跟随 WebSocket 配置
+	cfg.Runner.ApplyWSDefaults(cfg.WebSocket)
+
 	// Convert seconds to duration
 	cfg.JWT.AccessTokenExpire = time.Duration(viper.GetInt("jwt.access_token_expire")) * time.Second
 	cfg.JWT.RefreshTokenExpire = time.Duration(viper.GetInt("jwt.refresh_token_expire")) * time.Second

internal/config/runner.go

@@ -0,0 +1,28 @@
+package config
+
+// RunnerConfig Runner 集群配置
+type RunnerConfig struct {
+	Mode    string              `mapstructure:"mode"` // "standalone" | "cluster"，空则跟随 websocket.mode
+	Cluster RunnerClusterConfig `mapstructure:"cluster"`
+}
+
+// RunnerClusterConfig Runner 集群模式配置
+type RunnerClusterConfig struct {
+	InstanceID        string `mapstructure:"instance_id"`         // 空则跟随 websocket.cluster.instance_id
+	TaskChannel       string `mapstructure:"task_channel"`
+	ResultChannel     string `mapstructure:"result_channel"`
+	RegistryPrefix    string `mapstructure:"registry_prefix"`
+	CapPrefix         string `mapstructure:"cap_prefix"`
+	RegistryTTL       int    `mapstructure:"registry_ttl"`
+	HeartbeatInterval int    `mapstructure:"heartbeat_interval"`
+}
+
+// ApplyWSDefaults 用 WebSocket 配置填充 Runner 中未设置的共享字段
+func (r *RunnerConfig) ApplyWSDefaults(ws WSConfig) {
+	if r.Mode == "" {
+		r.Mode = ws.Mode
+	}
+	if r.Cluster.InstanceID == "" {
+		r.Cluster.InstanceID = ws.Cluster.InstanceID
+	}
+}