feat: support claude cache and thinking for upstream [OpenRouter] (#983)

* feat: support claude cache for upstream [OpenRouter]

* feat: support claude thinking for upstream [OpenRouter]

* feat: reasoning is common params for OpenRouter

dto/openai_request.go

@@ -29,7 +29,6 @@ type GeneralOpenAIRequest struct {
 	MaxTokens           uint           `json:"max_tokens,omitempty"`
 	MaxCompletionTokens uint           `json:"max_completion_tokens,omitempty"`
 	ReasoningEffort     string         `json:"reasoning_effort,omitempty"`
-	//Reasoning           json.RawMessage   `json:"reasoning,omitempty"`
 	Temperature      *float64          `json:"temperature,omitempty"`
 	TopP             float64           `json:"top_p,omitempty"`
 	TopK             int               `json:"top_k,omitempty"`
@@ -56,6 +55,8 @@ type GeneralOpenAIRequest struct {
 	EnableThinking   any               `json:"enable_thinking,omitempty"` // ali
 	ExtraBody        any               `json:"extra_body,omitempty"`
 	WebSearchOptions *WebSearchOptions `json:"web_search_options,omitempty"`
+  // OpenRouter Params
+	Reasoning json.RawMessage `json:"reasoning,omitempty"`
 }
 
 func (r *GeneralOpenAIRequest) ToMap() map[string]any {
@@ -125,6 +126,8 @@ type MediaContent struct {
 	InputAudio any    `json:"input_audio,omitempty"`
 	File       any    `json:"file,omitempty"`
 	VideoUrl   any    `json:"video_url,omitempty"`
+	// OpenRouter Params
+	CacheControl json.RawMessage `json:"cache_control,omitempty"`
 }
 
 func (m *MediaContent) GetImageMedia() *MessageImageUrl {