Performance improvements to captioner. Add ability to set a default caption for ace captioner to avoid needing to caption the audio so we only transcribe

ui/src/types.ts

@@ -269,6 +269,7 @@ export interface CaptionProcessConfig {
     caption_prompt?: string;
     max_res?: number;
     max_new_tokens?: number;
+    fixed_caption?: string;
   }
 }