* Add Ecto schema for imported custom events

* Start importing custom events from GA4

* query imported goals

* make it possible to query events metric from imported

* make it possible to query pageviews in goal breakdown

* make it possible to query conversion rate

* fix rate limiting test

* add CR tests for dashboard API

* implement imported link_url breakdown

* override special custom event names coming from GA4

* allow specific goal filters in imported_q

* update GA4 import tests to use Stats API

* Improve tests slightly

* Update CHANGELOG.md

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Co-authored-by: Robert Joonas <robertjoonas16@gmail.com>