test: add onboarding e2e harness

scripts/e2e/Dockerfile

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+FROM node:22-bookworm
+
+RUN corepack enable
+
+WORKDIR /app
+COPY . .
+
+RUN pnpm install --frozen-lockfile
+RUN pnpm build
+
+CMD ["bash"]

scripts/e2e/onboard-docker.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
+IMAGE_NAME="clawdis-onboard-e2e"
+
+echo "Building Docker image..."
+docker build -t "$IMAGE_NAME" -f "$ROOT_DIR/scripts/e2e/Dockerfile" "$ROOT_DIR"
+
+echo "Running onboarding E2E..."
+docker run --rm -t "$IMAGE_NAME" bash -lc '
+  set -euo pipefail
+
+  node dist/index.js onboard \
+    --non-interactive \
+    --mode local \
+    --workspace /root/clawd \
+    --auth-choice skip \
+    --gateway-port 18789 \
+    --gateway-bind loopback \
+    --gateway-auth off \
+    --tailscale off \
+    --skip-skills \
+    --skip-health \
+    --json
+
+  node dist/index.js gateway-daemon --port 18789 --bind loopback > /tmp/gateway.log 2>&1 &
+  GW_PID=$!
+  sleep 2
+
+  node dist/index.js health --timeout 2000 || (cat /tmp/gateway.log && exit 1)
+
+  kill "$GW_PID"
+  wait "$GW_PID" || true
+'
+
+echo "E2E complete."