feat: integrate FlareSolverr for Cloudflare bypass on clone sources

- Add FLARESOLVERR_URL env var to .env.example
- Update fetchSourceFurnidata to fall back to FlareSolverr on CF challenges (403/HTML)
- Add docker-compose.yml with FlareSolverr service
- Add scripts/health-check.sh for FlareSolverr readiness check
- Add health:check script to package.json
- Document FlareSolverr setup in README

scripts/health-check.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+URL="${FLARESOLVERR_URL:-http://localhost:8191}"
+MAX_RETRIES="${FLARESOLVERR_MAX_RETRIES:-30}"
+RETRY_INTERVAL="${FLARESOLVERR_RETRY_INTERVAL:-2}"
+
+echo "Waiting for FlareSolverr at ${URL}..."
+
+for i in $(seq 1 "$MAX_RETRIES"); do
+	if curl -sf "${URL}/health" >/dev/null 2>&1; then
+		echo "FlareSolverr is healthy."
+		exit 0
+	fi
+	echo "Attempt ${i}/${MAX_RETRIES} - FlareSolverr not ready, retrying in ${RETRY_INTERVAL}s..."
+	sleep "$RETRY_INTERVAL"
+done
+
+echo "ERROR: FlareSolverr did not become healthy after ${MAX_RETRIES} attempts."
+exit 1