(new): expand runtime APIs

(fix): harden concurrent lifecycle
(tests): add regression coverage
(doc): update v1.2 guidance

bot_webhook.go

@@ -257,10 +257,13 @@ func (bot *Bot[T]) CloseWebhook() error {
 		}
 	}
 	if bot.webhookLogger != nil {
-		if err := bot.webhookLogger.Close(); err != nil {
-			e = append(e, err)
+		if bot.webhookLoggerOwned {
+			if err := bot.webhookLogger.Close(); err != nil {
+				e = append(e, err)
+			}
 		}
 		bot.webhookLogger = nil
+		bot.webhookLoggerOwned = false
 	}
 	return errors.Join(e...)
 }
@@ -283,6 +286,7 @@ func (bot *Bot[T]) runWebhookRuntime(ctx context.Context, run func(context.Conte
 
 	if bot.webhookLogger == nil {
 		bot.webhookLogger = utils.CreateLogger("WEBHOOK", bot.GetLoggerLevel(), bot.logFormat, bot.logFormatter)
+		bot.webhookLoggerOwned = true
 	}
 	bot.addTokenReplacer(bot.webhookLogger)
 	bot.ExecRunners(runCtx)
@@ -297,6 +301,7 @@ func (bot *Bot[T]) runWebhookRuntime(ctx context.Context, run func(context.Conte
 	cancel()
 	close(bot.updateQueue)
 	<-workersDone
+	bot.middlewareWG.Wait()
 	bot.runnerOnceWG.Wait()
 	bot.runnerBgWG.Wait()