fix: bump main package version to 4.5.2

fix: messages version bump

Add messages failover (#320)

* add new response field
* add failover parameter
* formatting
* add failover testing
* change payload
* fix tests
* update messages package for release
* prepare for new release

---------

Co-authored-by: maxkahan <maxkahan94@gmail.com>

update version number

update ni v1 to use header authentication

make fields optional in sms response

build: add slack-notificaitons (#315)

update version

update package version

make data models accessible from top level