feat: added project id from the results returned by the search endpoint

[emlimlf]

In this PR

Added the project id from the results returned by the search endpoint. This will be used by the create collection since it requires the ID instead of the slug

Ticket

IN-1010

---

Note

Medium Risk
Alters the search endpoint response schema by adding a new column, which may require coordinated updates for downstream consumers that assume a fixed column set/order.

Overview
Updates search_collections_projects_repos.pipe to include a new id column in the unified search response, populating it from insightsProjects_filtered.id for project results and returning an empty string for collection and repository rows.

This changes the output schema/order for the search pipe consumers while keeping filtering, ordering, and limits the same.

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[joanagmaia]

@emlimlf @gaspergrom is this something that's still needed? It wasn't reviewed and it seems that it's stale. If this is already in production, let's make sure we merge this