feat: replace Docker healthcheck with curl

Dockerfile

@@ -1,5 +1,8 @@
 FROM python:3.13-slim
 
+# Install curl for healthcheck
+RUN apt-get update && apt-get install -y --no-install-recommends curl && rm -rf /var/lib/apt/lists/*
+
 # Install uv for fast dependency management
 COPY --from=ghcr.io/astral-sh/uv:latest /uv /usr/local/bin/uv
 

docker-compose.yml

@@ -10,7 +10,7 @@ services:
     environment:
       - DATA_DIR=/data
     healthcheck:
-      test: ["CMD", "python", "-c", "import httpx; r=httpx.get('http://localhost:8000/api/health'); exit(0 if r.status_code==200 else 1)"]
+      test: ["CMD", "curl", "-sf", "http://localhost:8000/api/health"]
       interval: 30s
       timeout: 5s
       retries: 3