fix: install curl and procps in Docker image for health checks

- Add curl for Docker health checks and diagnostics
- Add procps for process monitoring (ps command)
- Required for validation scripts to work properly
- Minimal size increase (~5MB) for critical debugging tools

Dockerfile

@@ -3,7 +3,13 @@ FROM python:3.10-slim AS base
 
 WORKDIR /app
 
-# Install dependencies
+# Install system dependencies (curl for health checks, procps for debugging)
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    curl \
+    procps \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Python dependencies
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt