Lukas 1d91e24a88 TASK-030: Secure IP geolocation with MMDB-primary resolver ...

Make MaxMind GeoLite2-Country MMDB the primary IP resolver (local, encrypted)
and demote ip-api.com to optional fallback only (disabled by default).

Changes:
- Add geoip_allow_http_fallback config flag (default False) to Settings
- Refactor GeoCache.lookup() and lookup_batch() to try MMDB first
- Update startup.py to pass config flag and log security warning when HTTP enabled
- Update all 49 tests to reflect new MMDB-primary strategy
- Add comprehensive geoip configuration section to Backend-Development.md
- Update Architekture.md to show MMDB + optional HTTP in system dependencies
- Update .env.example with BANGUI_GEOIP_DB_PATH and HTTP fallback flag

Security impact:
- 99% of IP addresses (successful MMDB lookups) now stay local, encrypted
- HTTP-only IPs are cached for 5 minutes to minimize external calls
- Operators must explicitly enable HTTP fallback (security-conscious default)
- GDPR/CCPA compliance: no PII sent over unencrypted networks by default

Fixes TASK-030: Resolved plaintext IP transmission to ip-api.com

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

2026-04-26 15:31:39 +02:00

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