RevIQ 575ca83300 Add GeoIP lookup support and update device fingerprints to base58 ...

- Add maxmind library for GeoIP database lookups when not behind Cloudflare
- Extract client IP from multiple header sources (CF, X-Real-IP, X-Forwarded-For, etc.)
- Change device fingerprints from UUID to base58 with device_ prefix
- Add isValidDeviceFingerprint() that accepts both new and legacy formats
- Colocate unit tests with source files, remove __tests__/unit directory
- Add test coverage reporting to test script

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2026-01-10 16:41:21 +08:00

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