MSTeams: stop on shutdown and honor chunk limit

src/auto-reply/chunk.ts

@@ -72,6 +72,9 @@ export function resolveTextChunkLimit(
         cfg?.imessage?.textChunkLimit
       );
     }
+    if (provider === "msteams") {
+      return cfg?.msteams?.textChunkLimit;
+    }
     return undefined;
   })();
   if (typeof providerOverride === "number" && providerOverride > 0) {

src/gateway/server.ts

@@ -2067,6 +2067,7 @@ export async function startGatewayServer(
       await stopSlackProvider();
       await stopSignalProvider();
       await stopIMessageProvider();
+      await stopMSTeamsProvider();
       await stopGmailWatcher();
       cron.stop();
       heartbeatRunner.stop();