add converting proxy to parakeet

apps/llama/configs/config.yaml

@@ -238,14 +238,23 @@ models:
 
   # STT via parakeet-server (parakeet.cpp OpenAI-compatible server, CPU, always loaded)
   # Model downloaded on first start and cached under /root/.cache/parakeet.cpp/models
-  # Exposes POST /v1/audio/transcriptions (OpenAI-compatible)
+  # parakeet-proxy.py sits in front to convert any audio format to WAV via ffmpeg,
+  # since parakeet-server only accepts real WAV but browsers send Ogg/Opus.
   "parakeet-tdt_ctc-1.1b":
     checkEndpoint: none
     cmd: |
-      parakeet-server
-        --port ${PORT}
-        --model tdt_ctc-1.1b-q4_k.gguf
-        --cache-dir /root/.cache/parakeet.cpp/models
+      sh -c "
+        parakeet-server \
+          --host 127.0.0.1 \
+          --port $((${PORT}+1)) \
+          --model tdt_ctc-1.1b-q4_k.gguf \
+          --cache-dir /root/.cache/parakeet.cpp/models &
+        exec env \
+          PROXY_PORT=${PORT} \
+          PARAKEET_PORT=$((${PORT}+1)) \
+          FFMPEG_BIN=/root/.cache/ffmpeg/ffmpeg \
+          python3 /config/parakeet-proxy.py
+      "
 
 
   # Image generation via stable-diffusion.cpp (sd-server)