- Add IP geolocation lookup via ip-api.com to get timezone from proxy IP
- Use ipify.org API for reliable proxy IP detection (replaces unreliable fingerprint.com scraping)
- Set browser timezone via CDP Emulation.setTimezoneOverride to match proxy location
- Add detectedTimezone and detectedLocation to preflight result
- Add /api/worker-registry/preflight-test endpoint for smoke testing
Fixes timezone mismatch where browser showed America/Phoenix while proxy was in America/New_York
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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