feat: add deepseek channel type

relay/relay_adaptor.go

@@ -9,6 +9,7 @@ import (
 	"one-api/relay/channel/claude"
 	"one-api/relay/channel/cloudflare"
 	"one-api/relay/channel/cohere"
+	"one-api/relay/channel/deepseek"
 	"one-api/relay/channel/dify"
 	"one-api/relay/channel/gemini"
 	"one-api/relay/channel/jina"
@@ -71,6 +72,8 @@ func GetAdaptor(apiType int) channel.Adaptor {
 		return &vertex.Adaptor{}
 	case constant.APITypeMistral:
 		return &mistral.Adaptor{}
+	case constant.APITypeDeepSeek:
+		return &deepseek.Adaptor{}
 	}
 	return nil
 }