feat: support ollama now (close #870)

relay/constant/api_type.go

@@ -15,6 +15,7 @@ const (
 	APITypeAIProxyLibrary
 	APITypeTencent
 	APITypeGemini
+	APITypeOllama
 
 	APITypeDummy // this one is only for count, do not add any channel after this
 )
@@ -40,6 +41,8 @@ func ChannelType2APIType(channelType int) int {
 		apiType = APITypeTencent
 	case common.ChannelTypeGemini:
 		apiType = APITypeGemini
+	case common.ChannelTypeOllama:
+		apiType = APITypeOllama
 	}
 	return apiType
 }