修改403逻辑: 先临时冷却，再根据连续次数决定是否判坏号

backend/internal/service/openai_gateway_403_reset_test.go

@@ -0,0 +1,39 @@
+package service
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+type openAI403CounterResetStub struct {
+	resetCalls []int64
+}
+
+func (s *openAI403CounterResetStub) IncrementOpenAI403Count(context.Context, int64, int) (int64, error) {
+	return 0, nil
+}
+
+func (s *openAI403CounterResetStub) ResetOpenAI403Count(_ context.Context, accountID int64) error {
+	s.resetCalls = append(s.resetCalls, accountID)
+	return nil
+}
+
+func TestOpenAIGatewayServiceRecordUsage_ResetsOpenAI403CounterBeforeZeroUsageReturn(t *testing.T) {
+	counter := &openAI403CounterResetStub{}
+	rateLimitSvc := NewRateLimitService(nil, nil, nil, nil, nil)
+	rateLimitSvc.SetOpenAI403CounterCache(counter)
+
+	svc := &OpenAIGatewayService{
+		rateLimitService: rateLimitSvc,
+	}
+
+	err := svc.RecordUsage(context.Background(), &OpenAIRecordUsageInput{
+		Result:  &OpenAIForwardResult{},
+		Account: &Account{ID: 777, Platform: PlatformOpenAI},
+	})
+
+	require.NoError(t, err)
+	require.Equal(t, []int64{777}, counter.resetCalls)
+}