CDNs found by themselves, and servers followed through time

PrivaPub now finds CDNs three ways, best first: the address ranges the
CDNs publish (Cloudflare, Fastly, Amazon CloudFront, Bunny, Gcore,
Imperva), downloaded daily by CdnUpdater and kept in CdnRangeSet; the
CDN's fingerprint in the responses it already gets from a server
(EdgeHintsHandler on the federation client); and the networks that carry
only a CDN. The fixed ASN list is gone; ASNs shared with plain hosting
(AWS, DataPacket) no longer hide a server. A server's Geo records the
CDN, its domain and how it was found, and weekly snapshots now keep the
city and coordinates too.

Servers through time (ServerPlaces): /instances/:host/history lists a
server's weekly snapshots, a CDN-fronted server's geo names the CDN's
domain and where the server was before it (before_cdn), and
/api/privapub/v1/cdns and /cdns/:domain group servers by CDN with week
by week who joined and who left. Owner decisions recorded in ROADMAP.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw

PrivaPub.Tests/Infrastructure/GeoLocatorTests.cs

@@ -1,4 +1,4 @@
-using Microsoft.Extensions.Logging.Abstractions;
+using Microsoft.Extensions.Logging.Abstractions;
 
 using PrivaPub.Infrastructure.Geo;
 using PrivaPub.Infrastructure.Http;
@@ -45,7 +45,7 @@ namespace PrivaPub.Tests.Infrastructure
 			Assert.NotNull(fix);
 			Assert.Equal(2, fix.Country.Length);
 			Assert.Equal(13335, fix.Asn);
-			Assert.Equal("Cloudflare", CdnNetworks.Of(fix.Asn));
+			Assert.Equal("Cloudflare", CdnCatalog.OfAsn(fix.Asn)?.Name);
 			Assert.NotNull(fix.AsnOrg);
 			Assert.NotNull(fix.Latitude);
 			Assert.Equal(Math.Round(fix.Latitude.Value, 1), fix.Latitude);
@@ -61,9 +61,9 @@ namespace PrivaPub.Tests.Infrastructure
 
 			Assert.Equal(IPAddress.Parse("203.0.113.7"), connected.Of("social.example"));
 			Assert.Null(connected.Of("other.example"));
-			Assert.Equal("Fastly", CdnNetworks.Of(54113));
-			Assert.Null(CdnNetworks.Of(64496));
-			Assert.Null(CdnNetworks.Of(default));
+			Assert.Equal("Fastly", CdnCatalog.OfAsn(54113)?.Name);
+			Assert.Null(CdnCatalog.OfAsn(64496));
+			Assert.Null(CdnCatalog.OfAsn(default));
 		}
 	}
 }