feat: replace DNS fix with automated Cloudflare outbound proxy provisioning for blocked network requests

feat: integrate headless Chromium browser support with automated path detection and configuration

refactor: remove internal self-ping keep-alive in favor of dashboard-based UptimeRobot setup

feat: migrate OPENCLAW_VERSION to build-time argument and hardcode health server ports

refactor: migrate dashboard to /dashboard and implement internal reverse proxy for gateway traffic

Initial commit