Add Support for Notification-Center

add support for notification_center (#81)

* add support for notification_center

* align to correct schema

* add new schema for new notification event

* remove logExample from any group

* update version for supporting one destionation with two NotificationRouting

* review by Zvika

* reviewd by RLRL

* final version

v0.5.5

Add internal api

Alerts API v3 - add get alert def by version id

adding a route to get alert def by version id (including deleted alerts)

Alerts API V3 - changing tracing filter to bigger int

changing in tracing filter the field latency_threshold_ms to be uint64 from uint32

Alerts API v3 - adding notificationGroupExcess

Due to a deprecation of multiple notification groups in this api, we've added a way to represent the excess fields that will be deleted in case some users still have more than one.
notificationGroupExcess will be representing the fields to be deleted in the future when the deprecation is done.

Alerts API v3 - adding timewindow enum values

adding missing values to timewindow enum to types:
unique count
metrics
tracing

Alerts API v3 changes in schema

changes in the schema
logsUnusual -> logsAnomaly
metricUnusual -> metricAnomaly

added the override fields in rules to specific alert types

Download Alerts list

Adding method that enable for client to download Alerts List as CSV text

Alerts API v3

Includes modified type list that should be easier to maneuver.
Added 'rules' - a wrapper around conditions for each alert type that would allow expansion into multiple conditions per alert (with overrides on specific parameters such as conditions)

Alerts API v3

Includes modified type list that should be easier to maneuver.
Added 'rules' - a wrapper around conditions for each alert type that would allow expansion into multiple conditions per alert (with overrides on specific parameters such as conditions)