replace RelayMetadatas with RelayModelCache in DamusState

Signed-off-by: Bryan Montz <bryanmontz@me.com>
Signed-off-by: William Casarin <jb55@jb55.com>

damus/Nostr/RelayPool.swift

@@ -114,8 +114,13 @@ class RelayPool {
         }
         let relay = Relay(descriptor: desc, connection: conn)
         self.relays.append(relay)
+    }
+    
+    func setLog(_ log: RelayLog, for relay_id: String) {
+        // add the current network state to the log
+        log.add("Network state: \(network_monitor.currentPath.status)")
         
-        relay.connection.log.add("Network state: \(network_monitor.currentPath.status)")
+        get_relay(relay_id)?.connection.log = log
     }
     
     /// This is used to retry dead connections