fix: increase websocket read limit to 1MB

internal/bot/bot.go

@@ -72,6 +72,9 @@ func (b *Bot) connect(ctx context.Context) error {
 		return fmt.Errorf("connecting to matterbridge: %w", err)
 	}
 
+	// Increase read limit to 1MB to handle large Matrix messages
+	conn.SetReadLimit(1024 * 1024)
+
 	b.mu.Lock()
 	b.conn = conn
 	b.mu.Unlock()