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/interfaces.go

@@ -8,6 +8,17 @@ import (
 )
 
 type Fetcher interface {
+	String() string
+	CanFetchAnyIP() bool
+	Token() (token string)
+	InfoFetcher
+}
+
+type InfoFetcher interface {
 	FetchInfo(ctx context.Context, ip netip.Addr) (
 		result models.PublicIP, err error)
 }
+
+type Warner interface {
+	Warn(message string)
+}