Missing project_id in pipeline hook data

Summary

Before your API change where you changed everything from "builds" to "pipelines", every triggered hook contained the project id, which was used for one of our integrations.

With push events, we get an field called project_id with all the information we need. But unfortunately there is no such information within the pipeline event, just a lot a lot of other ids.

This happens both in CE and EE editions.

Steps to reproduce

Create an hook for pipeline events and wait for an succeeded pipeline.

What is the current bug behavior?

Missing project_id field for pipeline events

What is the expected correct behavior?

We get the field project_id for every event, no matter if push or pipeline

Possible fixes

Just add the project_id again in upcoming versions, either directly with the field project_id as before or inside the dict project as id or as you like. We just need the project_id somewhere.