feat(event): Add event list API

[earthpyy]

Hi, Ruby newbie here. This is my first Ruby and Lago contribution so, if there is any suggestion, I'd be much appreciated!

Roadmap Task

👉 https://getlago.canny.io/feature-requests/p/retrieve-and-filter-events

Context

Currently, REST API does not provide the endpoint to list all events (as in the Developer -> Events page). This pull request aim to expose the event list to the REST API to let the user retrieve and filter events.

Description

This pull request add supports for:

• Adding GET /api/v1/events endpoint
• Filtering events by code, external_subscription_id, timestamp_from, and timestamp_to

I'm also planning to checkout the front-end side to add these kinds of filter into the UI later as well.

[ancorcruz]

Hi @earthpyy,

Thank you for your contribution and welcome to Ruby and Lago! 🎉 We’re really excited to have you onboard and appreciate your efforts on this feature.

Your implementation of the GET /api/v1/events endpoint looks great, and we’re glad to see how you’ve incorporated filtering by code, external_subscription_id, timestamp_from, and timestamp_to. These additions will definitely improve the flexibility of the API and address the request from the roadmap.

Before we merge, there are just a couple of improvements around the tests that we’ve highlighted with messages. If you could address those, we’ll be all set to move forward! Let us know if you need any help with the changes or have any questions — we’re happy to assist.

Looking forward to your potential contributions on the front-end side as well! Keep up the great work! 😊

[earthpyy]

Hi @ancorcruz, thanks for the review! I've already updated the tests from your suggestion.