Start on live transcription and python sidecar (faster-whisper)

src/worker/inference.worker.ts

@@ -194,6 +194,7 @@ async function transcribe(message: TranscribeMessage): Promise<void> {
       type: "error",
       stage: "transcribe",
       message: "No model loaded — send a \"load\" message first.",
+      requestId: message.requestId,
     });
     return;
   }
@@ -204,7 +205,8 @@ async function transcribe(message: TranscribeMessage): Promise<void> {
     asr.tokenizer as ConstructorParameters<typeof WhisperTextStreamer>[0],
     {
       skip_prompt: true,
-      callback_function: (text: string) => post({ type: "partial", text }),
+      callback_function: (text: string) =>
+        post({ type: "partial", text, requestId: message.requestId }),
     },
   );
 
@@ -233,6 +235,7 @@ async function transcribe(message: TranscribeMessage): Promise<void> {
     type: "result",
     text: (single.text ?? "").trim(),
     chunks: single.chunks ?? [],
+    requestId: message.requestId,
   };
   post(result);
 }
@@ -255,7 +258,12 @@ scope.addEventListener("message", (event) => {
       break;
     case "transcribe":
       transcribe(data).catch((error: unknown) => {
-        post({ type: "error", stage: "transcribe", message: errorMessage(error) });
+        post({
+          type: "error",
+          stage: "transcribe",
+          message: errorMessage(error),
+          requestId: data.requestId,
+        });
       });
       break;
   }