Replace the (unconfirmed) iplocate API expander with a database-backed one that
reads the iplocate ip-to-asn CSV (network,asn,...) proxied through the artifactapi
github remote. It downloads and indexes the whole DB once (ASN -> CIDRs), serves
every asn address group from the in-memory index, and rebuilds on a 24h TTL;
refresh failures keep the last-good index (fail-safe). No API key needed.
- Add IPLocateDB expander (zip + CSV parsing, ASN normalization).
- Wire it in main (TOMSWALLAPI_IPLOCATE_DB_URL overrides the default artifactapi
URL); remove the dead API client.
- Unit tests: CSV indexing (incl. quoted org fields), zip extraction, missing
columns, and ASN normalization.
benvin