feat(publicip): resilient public ip fetcher (#2518)

- `PUBLICIP_API` accepts a comma separated list of ip data sources, where the first one is the base default one, and sources after it are backup sources used if we are rate limited.
- `PUBLICIP_API` defaults to `ipinfo,ifconfigco,ip2location,cloudflare` such that it now has `ifconfigco,ip2location,cloudflare` as backup ip data sources.
- `PUBLICIP_API_TOKEN` accepts a comma separated list of ip data source tokens, each corresponding by position to the APIs listed in `PUBLICIP_API`.
- logs ip data source when logging public ip information
- assume a rate limiting error is for 30 days (no persistence)
- ready for future live settings updates
  - consider an ip data source no longer banned if the token changes
  - keeps track of ban times when updating the list of fetchers

internal/publicip/api/multi.go

@@ -13,7 +13,7 @@ import (
 // If an error is encountered, all the operations are canceled and
 // an error is returned, so the results returned should be considered
 // incomplete in this case.
-func FetchMultiInfo(ctx context.Context, fetcher Fetcher, ips []netip.Addr) (
+func FetchMultiInfo(ctx context.Context, fetcher InfoFetcher, ips []netip.Addr) (
 	results []models.PublicIP, err error,
 ) {
 	ctx, cancel := context.WithCancel(ctx)