merge v0.1.121 and fixed conflict

backend/internal/service/openai_ws_protocol_forward_test.go

@@ -618,6 +618,7 @@ func TestNewOpenAIGatewayService_InitializesOpenAIWSResolver(t *testing.T) {
 		nil,
 		nil,
 		nil,
+		nil,
 	)
 
 	decision := svc.getOpenAIWSProtocolResolver().Resolve(nil)

backend/internal/service/scheduler_cache.go

@@ -59,6 +59,8 @@ type SchedulerCache interface {
 	UpdateLastUsed(ctx context.Context, updates map[int64]time.Time) error
 	// TryLockBucket 尝试获取分桶重建锁。
 	TryLockBucket(ctx context.Context, bucket SchedulerBucket, ttl time.Duration) (bool, error)
+	// UnlockBucket 释放分桶重建锁。
+	UnlockBucket(ctx context.Context, bucket SchedulerBucket) error
 	// ListBuckets 返回已注册的分桶集合。
 	ListBuckets(ctx context.Context) ([]SchedulerBucket, error)
 	// GetOutboxWatermark 读取 outbox 水位。

backend/migration_release/095_channel_features.sql

-ALTER TABLE channels ADD COLUMN IF NOT EXISTS features TEXT NOT NULL DEFAULT '';
-COMMENT ON COLUMN channels.features IS '渠道特性描述，JSON 数组格式，用于支付页面展示';