feat: add system prompt override functionality in channel settings and request handling #1468

dto/channel_settings.go

@@ -6,4 +6,5 @@ type ChannelSettings struct {
 	Proxy                  string `json:"proxy"`
 	PassThroughBodyEnabled bool   `json:"pass_through_body_enabled,omitempty"`
 	SystemPrompt           string `json:"system_prompt,omitempty"`
+	SystemPromptOverride   bool   `json:"system_prompt_override,omitempty"`
 }