Fix Seed-VC startup readiness and clarify Applio models

experiments/seed-vc/compose.yaml

@@ -15,6 +15,7 @@ services:
       - "127.0.0.1:8010:7860"
     volumes:
       - /data/voice/seed-vc/huggingface:/models/huggingface
+      - /data/voice/seed-vc/checkpoints:/app/checkpoints
       - /data/voice/seed-vc/output:/app/results
     healthcheck:
       test: ["CMD-SHELL", "curl -fsS http://127.0.0.1:7860/ >/dev/null"]