Rename blocklists to IP lists, add IP lookup flags, raise the download limit to 200 MiB (closes #233)

The lists are not only used for blocking, so the package, the `blocklists` field of the IP lookup answer and the state directory are now IP lists (`internal/iplist`, `ip_lists`, `iplists`). Every result gains a `flags` object with `is_tor` and `is_bogon`. The largest list file accepted is 200 MiB.

Judgement call: the dated 2026-10-27 `TODO.md` entry keeps the old word.
Rule suppressed: `tagliatelle` on the two result structs, for snake_case keys.

Model: opus-5-5

internal/server/server.go

@@ -22,9 +22,9 @@ import (
 	"sync/atomic"
 	"time"
 
-	"git.eeqj.de/sneak/routewatch/internal/blocklist"
 	"git.eeqj.de/sneak/routewatch/internal/config"
 	"git.eeqj.de/sneak/routewatch/internal/database"
+	"git.eeqj.de/sneak/routewatch/internal/iplist"
 	"git.eeqj.de/sneak/routewatch/internal/logger"
 	"git.eeqj.de/sneak/routewatch/internal/routetable"
 	"git.eeqj.de/sneak/routewatch/internal/streamer"
@@ -45,10 +45,10 @@ type ASNFetcher interface {
 	GetStats() ASNFetcherStats
 }
 
-// Blocklists tells which public blocklists list an address, from copies it
-// keeps in memory, as *blocklist.Blocklists does.
-type Blocklists interface {
-	Lookup(addr netip.Addr) []blocklist.Listing
+// IPLists tells which public IP lists contain an address, from copies it keeps
+// in memory, as *iplist.IPLists does.
+type IPLists interface {
+	Lookup(addr netip.Addr) []iplist.Listing
 	ShortestInterval() time.Duration
 }
 
@@ -69,7 +69,7 @@ type Server struct {
 	port       int
 	srv        *http.Server
 	asnFetcher ASNFetcher
-	blocklists Blocklists
+	ipLists    IPLists
 
 	// trustedProxies are the reverse proxies whose X-Forwarded-For header
 	// RealIPMiddleware believes
@@ -202,8 +202,8 @@ func (s *Server) SetASNFetcher(fetcher ASNFetcher) {
 	s.asnFetcher = fetcher
 }
 
-// SetBlocklists sets the blocklists the IP lookups report. Call it before
-// Start: the handlers read the blocklists without a lock.
-func (s *Server) SetBlocklists(blocklists Blocklists) {
-	s.blocklists = blocklists
+// SetIPLists sets the IP lists the IP lookups report. Call it before Start:
+// the handlers read the IP lists without a lock.
+func (s *Server) SetIPLists(ipLists IPLists) {
+	s.ipLists = ipLists
 }