fix: sync codex field (#6018)

dto/openai_request.go

@@ -874,6 +874,9 @@ type OpenAIResponsesRequest struct {
 	User             json.RawMessage `json:"user,omitempty"`
 	MaxToolCalls     *uint           `json:"max_tool_calls,omitempty"`
 	Prompt           json.RawMessage `json:"prompt,omitempty"`
+	// Codex Responses metadata/client_metadata:
+	// https://github.com/openai/codex/commit/14df0e8833aad0d6d78287954b61ffac67af936c
+	ClientMetadata json.RawMessage `json:"client_metadata,omitempty"`
 	// qwen
 	EnableThinking json.RawMessage `json:"enable_thinking,omitempty"`
 	// perplexity
@@ -958,8 +961,10 @@ func (r *OpenAIResponsesRequest) GetToolsMap() []map[string]any {
 }
 
 type Reasoning struct {
-	Effort  string `json:"effort,omitempty"`
-	Summary string `json:"summary,omitempty"`
+	Effort  string          `json:"effort,omitempty"`
+	Summary string          `json:"summary,omitempty"`
+	Mode    json.RawMessage `json:"mode,omitempty"`
+	Context json.RawMessage `json:"context,omitempty"`
 }
 
 type Input struct {