fix: move cacheRead/cacheWriteSum to outer scope to fix build error

Variables were defined inside if block but referenced outside in gopool.Go closure.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

model/log.go

@@ -194,9 +194,9 @@ func RecordConsumeLog(c *gin.Context, userId int, params RecordConsumeLogParams)
 	}
 	if common.DataExportEnabled {
 		// 从 Other 中提取缓存 token
-		cacheTokens := 0
+		cacheRead := 0
+		cacheWriteSum := 0
 		if params.Other != nil {
-			cacheRead := 0
 			if v, ok := params.Other["cache_tokens"]; ok {
 				if n, ok := v.(int); ok {
 					cacheRead = n
@@ -230,13 +230,12 @@ func RecordConsumeLog(c *gin.Context, userId int, params RecordConsumeLogParams)
 			}
 			// cache_creation_tokens 已经是总的缓存写入 token，5m 和 1h 是细分
 			// 取 max(cache_creation_tokens, cache_creation_tokens_5m + cache_creation_tokens_1h)
-			cacheWriteSum := cacheWrite5m + cacheWrite1h
+			cacheWriteSum = cacheWrite5m + cacheWrite1h
 			if cacheWrite > cacheWriteSum {
 				cacheWriteSum = cacheWrite
 			}
-			cacheTokens = cacheRead + cacheWriteSum
 		}
-		totalTokens := params.PromptTokens + params.CompletionTokens + cacheTokens
+		totalTokens := params.PromptTokens + params.CompletionTokens + cacheRead + cacheWriteSum
 		promptTokens := params.PromptTokens
 		completionTokens := params.CompletionTokens
 		gopool.Go(func() {