feat: add fixtures for test tinybird pipes

[ulemons]

Changes proposed ✍️

What

we want to test tinybird pipes locally.

How

Added docs for testing tinybird locally. Also fixtures were added:

• activityRelations_deduplicated_cleaned_ds.ndjson
• insightsProjects.ndjson
• the cli uses the TB_HOST to connect to the local instance of tinybird
• scaffold.insights.yaml is forced to use the classic tinybird version
• in the configure-tinybird-sink.sh we are taking the token from the local tinybird instance
• the tinybird-local-sink.properties is using the 7181 instead of the 80

-⚠️ remove fields from sequin.yml

Checklist ✅

• Label appropriately with Feature, Improvement, or Bug.

[borfast]

Good stuff! 👏

I'm approving so this doesn't get blocked unnecessarily, but I'd love it if the instructions were slightly different, as I mentioned in the comment.

[borfast]

That's perfect, thanks! It wasn't a required change, but thanks for doing it. 👍

I know it seems stupid, since the tokens are still recorded in a file, but it's about making this intentional and controlled, as opposed to incidental and uncontrolled exposure. The .env file is local only to the project, it's easier to delete, the tokens don't end up buried and forgotten in the middle of a ton of things, etc. It's a minor improvement but it's about following sound security principles. 🙂

[epipav]

lgtm 👍