first
del hello
query return json
add alert record
add arrival timestamp and state field
correct typo model -> models
when alert arrive , record it to db
1: fix service to metric error
2: add alarm info record to db
add dashbaoard route
query all alarm infos
 add dashboard and query all alarm info
add time filter
1: close debug info
2: fix dashboard query json , value filed error make it unable to display
specifiey metric length
1: distinct fields to deduplicate
1: add query set deduplicate.
logic of the query
1: upgrade deduplicate algorithm to use the latest value
2: change filter_record host field to avoid multi-host may cause it overflow.
update cli tools in script
delete pyc binary file