feat: 优化代理服务

internal/channel/channel.go

@@ -10,17 +10,14 @@ import (
 )
 
 // ChannelProxy defines the interface for different API channel proxies.
-// It's responsible for channel-specific logic like URL building and request modification.
 type ChannelProxy interface {
 	// BuildUpstreamURL constructs the target URL for the upstream service.
 	BuildUpstreamURL(originalURL *url.URL, group *models.Group) (string, error)
 
 	// ModifyRequest allows the channel to add specific headers or modify the request
-	// before it's sent to the upstream service.
 	ModifyRequest(req *http.Request, apiKey *models.APIKey, group *models.Group)
 
 	// IsStreamRequest checks if the request is for a streaming response,
-	// now using the cached request body to avoid re-reading the stream.
 	IsStreamRequest(c *gin.Context, bodyBytes []byte) bool
 
 	// ValidateKey checks if the given API key is valid.