fix: hybridsearch should support offset param in restful api related (#43721)

related to #43556 , pr: #43586

Signed-off-by: xiaofanluan <xiaofan.luan@zilliz.com>

Author: xiaofan-luan

internal/distributed/proxy/httpserver/handler_v2.go

@@ -1288,6 +1288,7 @@ func (h *HandlersV2) advancedSearch(ctx context.Context, c *gin.Context, anyReq
 		{Key: proxy.RankTypeKey, Value: httpReq.Rerank.Strategy},
 		{Key: proxy.RankParamsKey, Value: string(bs)},
 		{Key: ParamLimit, Value: strconv.FormatInt(int64(httpReq.Limit), 10)},
+		{Key: proxy.OffsetKey, Value: strconv.FormatInt(int64(httpReq.Offset), 10)},
 		{Key: ParamRoundDecimal, Value: "-1"},
 	}
 	if httpReq.GroupByField != "" {

internal/distributed/proxy/httpserver/request_v2.go

@@ -299,6 +299,7 @@ type HybridSearchReq struct {
 	Search           []SubSearchReq `json:"search"`
 	Rerank           Rand           `json:"rerank"`
 	Limit            int32          `json:"limit"`
+	Offset           int32          `json:"offset"`
 	GroupByField     string         `json:"groupingField"`
 	GroupSize        int32          `json:"groupSize"`
 	StrictGroupSize  bool           `json:"strictGroupSize"`