reduce error log spam: don't error on client id mismatch and don't log abort in worker matchmaking polling

src/server/GameServer.ts

@@ -223,7 +223,7 @@ export class GameServer {
           c.clientID !== client.clientID,
       );
       if (conflicting !== undefined) {
-        this.log.error("client ids do not match", {
+        this.log.warn("client ids do not match", {
           clientID: client.clientID,
           clientIP: ipAnonymize(client.ip),
           clientPersistentID: client.persistentID,

src/server/Worker.ts

@@ -574,6 +574,10 @@ async function startMatchmakingPolling(gm: GameManager) {
           }, 7000);
         }
       } catch (error) {
+        if (error instanceof Error && error.name === "AbortError") {
+          // Abort is expected if no game is scheduled on this worker.
+          return;
+        }
         log.error(`Error polling lobby:`, error);
       }
     },