fix: gemini batch embedding token not counted

relay/helper/valid_request.go

@@ -22,8 +22,10 @@ func GetAndValidateRequest(c *gin.Context, format types.RelayFormat) (request dt
 	case types.RelayFormatOpenAI:
 		request, err = GetAndValidateTextRequest(c, relayMode)
 	case types.RelayFormatGemini:
-		if strings.Contains(c.Request.URL.Path, ":embedContent") || strings.Contains(c.Request.URL.Path, ":batchEmbedContents") {
+		if strings.Contains(c.Request.URL.Path, ":embedContent") {
 			request, err = GetAndValidateGeminiEmbeddingRequest(c)
+		} else if strings.Contains(c.Request.URL.Path, ":batchEmbedContents") {
+			request, err = GetAndValidateGeminiBatchEmbeddingRequest(c)
 		} else {
 			request, err = GetAndValidateGeminiRequest(c)
 		}
@@ -319,3 +321,12 @@ func GetAndValidateGeminiEmbeddingRequest(c *gin.Context) (*dto.GeminiEmbeddingR
 	}
 	return request, nil
 }
+
+func GetAndValidateGeminiBatchEmbeddingRequest(c *gin.Context) (*dto.GeminiBatchEmbeddingRequest, error) {
+	request := &dto.GeminiBatchEmbeddingRequest{}
+	err := common.UnmarshalBodyReusable(c, request)
+	if err != nil {
+		return nil, err
+	}
+	return request, nil
+}