milestone 25: client names learned over reverse dns

src/web/server.zig

@@ -25,6 +25,7 @@ const address = @import("../platform/address.zig");
 const api_limiter = @import("api_limiter.zig");
 const auth = @import("auth.zig");
 const cert_store = @import("../server/cert_store.zig");
+const client_names = @import("../server/client_names.zig");
 const clients = @import("../server/clients.zig");
 const db = @import("../storage/db.zig");
 const disk_monitor = @import("../storage/disk_monitor.zig");
@@ -130,6 +131,8 @@ pub const WebState = struct {
     handler: ?*dns_handler.Handler = null,
     pause: ?*pause_mod.Pause = null,
     tracker: ?*clients.Tracker = null,
+    /// The learned-name resolver, for `metrics.collect` (milestone-25 ruling 9).
+    client_names: ?*client_names.Resolver = null,
     manager: ?*manager_mod.Manager = null,
     pool: ?*pool_mod.Pool = null,
     monitor: ?*disk_monitor.Monitor = null,