fix: move entrypoint.sh to project root (deploy/ is in .dockerignore)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Dockerfile.service

@@ -86,7 +86,7 @@ RUN adduser -D -h /home/appuser appuser && \
     chown -R appuser:appuser /app /data/claude-tenants /home/appuser/.ssh
 
 # Copy entrypoint script (runs as root to fix SSH key permissions, then drops to appuser)
-COPY deploy/docker/entrypoint.sh /entrypoint.sh
+COPY entrypoint.sh /entrypoint.sh
 RUN chmod +x /entrypoint.sh
 
 ARG SERVICE_PORT=3000