feat: enhance file handling and logging in the application

relay/channel/gemini/relay-gemini.go

@@ -208,6 +208,34 @@ func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest) (*GeminiChatReque
 						},
 					})
 				}
+			} else if part.Type == dto.ContentTypeFile {
+				if part.GetFile().FileId != "" {
+					return nil, fmt.Errorf("only base64 file is supported in gemini")
+				}
+				format, base64String, err := service.DecodeBase64FileData(part.GetFile().FileData)
+				if err != nil {
+					return nil, fmt.Errorf("decode base64 file data failed: %s", err.Error())
+				}
+				parts = append(parts, GeminiPart{
+					InlineData: &GeminiInlineData{
+						MimeType: format,
+						Data:     base64String,
+					},
+				})
+			} else if part.Type == dto.ContentTypeInputAudio {
+				if part.GetInputAudio().Data == "" {
+					return nil, fmt.Errorf("only base64 audio is supported in gemini")
+				}
+				format, base64String, err := service.DecodeBase64FileData(part.GetInputAudio().Data)
+				if err != nil {
+					return nil, fmt.Errorf("decode base64 audio data failed: %s", err.Error())
+				}
+				parts = append(parts, GeminiPart{
+					InlineData: &GeminiInlineData{
+						MimeType: format,
+						Data:     base64String,
+					},
+				})
 			}
 		}
 
@@ -233,7 +261,6 @@ func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest) (*GeminiChatReque
 	return &geminiRequest, nil
 }
 
-
 // cleanFunctionParameters recursively removes unsupported fields from Gemini function parameters.
 func cleanFunctionParameters(params interface{}) interface{} {
 	if params == nil {
@@ -307,7 +334,6 @@ func cleanFunctionParameters(params interface{}) interface{} {
 		cleanedMap["items"] = cleanedItemsArray
 	}
 
-
 	// Recursively clean other schema composition keywords if necessary
 	for _, field := range []string{"allOf", "anyOf", "oneOf"} {
 		if nested, ok := cleanedMap[field].([]interface{}); ok {
@@ -322,7 +348,6 @@ func cleanFunctionParameters(params interface{}) interface{} {
 	return cleanedMap
 }
 
-
 func removeAdditionalPropertiesWithDepth(schema interface{}, depth int) interface{} {
 	if depth >= 5 {
 		return schema