fix: 替换请求头转发方式并修复空指针拦截

移除 util.ForwardHeaders，改为从 GoFrame 请求上下文直接提取原始请求头；新增 GetFileBytesFromURL 方法替代 DownloadFile 下载 OSS 文件；增加 composeTask 空指针校验防止异常；调整数据库连接池参数。

service/prompt/prompt_compose_service.go

@@ -4,14 +4,13 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"prompts-core/service/session"
-
 	"prompts-core/common/util"
 	"prompts-core/consts/public"
 	"prompts-core/dao"
 	"prompts-core/model/dto"
 	"prompts-core/model/entity"
 	"prompts-core/service/gateway"
+	"prompts-core/service/session"
 
 	"gitea.redpowerfuture.com/red-future/common/beans"
 	"gitea.redpowerfuture.com/red-future/common/utils"
@@ -137,12 +136,17 @@ func Callback(ctx context.Context, req *dto.CallbackReq) error {
 	if err != nil {
 		return fmt.Errorf("查询任务失败: %w", err)
 	}
-
+	// 新增空指针拦截
+	if composeTask == nil {
+		g.Log().Infof(ctx, "[回调处理] composeTask 模型配置为空，无法查询模型配置 taskId=%s,req=%v", req.TaskId, req.State)
+		return fmt.Errorf("composeTask 任务对象为空，无法查询模型配置 taskId=%s,req=%v", req.TaskId, req.State)
+	}
 	// 2) 读取 OSS 文件内容
 	var ossContent []byte
 	if req.OssFile != "" {
-		ossContent, err = gateway.DownloadFile(req.OssFile)
+		ossContent, err = gateway.GetFileBytesFromURL(ctx, req.OssFile)
 		if err != nil {
+			g.Log().Infof(ctx, "[回调处理] 读取OSS文件 taskId=%s,state=%v,ossFile=%v", req.TaskId, req.State, req.OssFile)
 			g.Log().Warningf(ctx, "[回调处理] 读取OSS失败 taskId=%s err=%v", req.TaskId, err)
 		}
 	}