feat: 新增业务字段路径读写工具

新增 TakeBusinessFields、WriteBusinessFields、SetByPath 与 GetByPath 等工具，支持按映射路径写入请求体与解析响应，并更新相关依赖。

controller/model_call_controller.go

@@ -0,0 +1,40 @@
+package controller
+
+import (
+	"context"
+	"encoding/json"
+	"model-gateway/model/dto"
+	"model-gateway/service"
+	"net/http"
+
+	"gitea.redpowerfuture.com/red-future/common/beans"
+	"github.com/gogf/gf/v2/frame/g"
+)
+
+// ModelCall 模型调用控制器
+var ModelCall = new(modelCall)
+
+type modelCall struct{}
+
+// ModelCall 模型调用
+func (c *modelCall) ModelCall(ctx context.Context, req *dto.ModelCallReq) (res *dto.ModelCallRes, err error) {
+	return service.ModelCall.ModelCall(ctx, req)
+}
+
+// CreateSessionStream 创建模型会话(流式)
+func (c *modelCall) CreateSessionStream(ctx context.Context, req *dto.ModelCallStreamReq) (res *beans.ResponseEmpty, err error) {
+	r := g.RequestFromCtx(ctx)
+	w := r.Response.RawWriter()
+	err = service.ModelCall.ModelCallStream(ctx, w, req)
+	if err != nil {
+		h := w.Header()
+		h.Set("Content-Type", "application/json; charset=utf-8")
+		errResp, _ := json.Marshal(map[string]interface{}{
+			"code":    http.StatusInternalServerError,
+			"message": err.Error(),
+		})
+		w.WriteHeader(http.StatusInternalServerError)
+		_, _ = w.Write(errResp)
+	}
+	return
+}