## About the changes
EventsService is a dependency in most of our services. This creates
helper methods to create them easily and replace a few places where
we're creating them manually
https://linear.app/unleash/issue/2-1403/consider-refactoring-the-way-tags-are-fetched-for-the-events
This adds 2 methods to `EventService`:
- `storeEvent`;
- `storeEvents`;
This allows us to run event-specific logic inside these methods. In the
case of this PR, this means fetching the feature tags in case the event
contains a `featureName` and there are no tags specified in the event.
This prevents us from having to remember to fetch the tags in order to
store feature-related events except for very specific cases, like the
deletion of a feature - You can't fetch tags for a feature that no
longer exists, so in that case we need to pre-fetch the tags before
deleting the feature.
This also allows us to do any event-specific post-processing to the
event before reaching the DB layer.
In general I think it's also nicer that we reference the event service
instead of the event store directly.
There's a lot of changes and a lot of files touched, but most of it is
boilerplate to inject the `eventService` where needed instead of using
the `eventStore` directly.
Hopefully this will be a better approach than
https://github.com/Unleash/unleash/pull/4729
---------
Co-authored-by: Gastón Fournier <gaston@getunleash.io>
