feat(bot): 增加 accountId 属性.

增加该属性有利于其他组件对机器人账户进行标记.

scalabot-app/src/main/kotlin/ScalaBot.kt

@@ -30,6 +30,7 @@ internal class ScalaBot(
     extensionFinders: Set<ExtensionPackageFinder>,
     botConfig: BotConfig,
     private val creatorId: Long = botConfig.account.creatorId,
+    val accountId: Long = botConfig.account.id,
     val extensions: Set<Artifact> = botConfig.extensions
 ) :
     AbilityBot(