* optimize handle external event

* feat: rule engine rewrite

* rename filter to muteStrategy

* rename file

* fix bg strategy match bug

* fix deadlock

* Update mute_strategy.go

* Update rule_helper.go

* use rule from cache

* add comment

* add IdentDeletedMuteStrategy

* rename strategy

* rename eventTags to tagsMap
Co-authored-by: ulricqin <ulricqin@qq.com>

* support multi

* refactor

* code refactor

* refactor

* code refactor

* fix run mult cluster rule

* code refactor

* add alerting_engine api

* add alerting_engine api

* update sql

* refactor recording push

* refactor

* refactor

* delete useless cluster

* split to fields

* change stats

* change stats

* 规则名称支持变量

* parse rule_name

* manage bindings of n9e-server and datasource

* fix sync memsto

* alert rule support cate

* his_event add cate

* change RecoverEvent time

* add get event api

* event query by cate

* support handle event service api

* change alert rule

* Db connect update (#939)

* update target's cluster field when clustername modified in server.conf

* code refactor

* db connect update

* delete DriverName
Co-authored-by: NUlric Qin <ulric.qin@gmail.com>
Co-authored-by: Nzhangjiandong <zhang.jiandong@baiso.com>

* update sql struct

* change sql

* add some files for new dashboard

* add new board apis

* fix query data

* add dashboard migrate api

* rule note support template

* add value as data for template

* parse rule note before persist

* use prometheus var names

* fixbug rule note template

* refactor sql

* add logo

* refactor: add some log

* mv package poster to pkg

* add version

* compute user total in usage reporter

* feat: add some service api
Co-authored-by: N710leo <710leo@gmail.com>
Co-authored-by: Ncountingwww <871138993@qq.com>
Co-authored-by: Nzhangjiandong <zhang.jiandong@baiso.com>