Added log ip-masking

[nanaabdul1172]

Closes #222
Added LOG_IP_MASKING env var (default: "last-octet"). Masked the last octet of IPv4 addresses and the last 64 bits of IPv6 addresses before logging or storing.

[Xhristin3]

Hi @nanaabdul1172 👋 — appreciate the IP-masking work for #222, the new ip-mask helper and audit integration look well thought-out. However, the CI / quality check is currently red on this branch (run 27625951658). Could you take a look at the failure logs and push a fix? Once CI is green I'll be happy to merge. Thanks! 🙏

[Xhristin3]

Nice feature — LOG_IP_MASKING with modes none, last-octet, full-hash covering v4/v6/v4-mapped is solid. Holding on merge because quality CI is red:\n\napi test suite has one failure:\n- RequestLoggerMiddleware › logs a 2xx request with the required fields on completion\n- the assertion expects "1.2.3.4" but now receives "1.2.3.0" — i.e. your last-octet masking is actually working, the existing test just predates it.\n\nPlease update that assertion in api/src/middleware/request-logger.middleware.spec.ts to expect the masked IP ("1.2.3.0") so it reflects the new behavior. Re-request review once CI is green 🙏