# Description
This PR creates a proper Booking Source in `int_core__bookings` table. This mostly refers to ensure that whenever we do data requests tickets on this regards we have a proper logic in place (as last time we had issues because of this). Logic follows Gus recommendation on applying:
```
case
when upper(coalesce(bsrc.booking_source, 'UNKNOWN')) = 'UNKNOWN'
then b.raw_booking_source
else bsrc.booking_source
end
```
where b. is Booking table and bsrc. is Booking Source table.
Things to note:
* A new `stg_core__booking_source` table is created, full-refreshed from the backend (less than 10 records)
* I added a unique test for `stg_core__booking` that was not in there. I don't document the rest of the model though.
* I remove the previous `id_booking_source` as it wasn't used and the logic in place should be far more accurate.
* I do NOT remove the existing `verification_request_booking_source`. I don't remember what's this but I see this is in use specially on Guest Insights (CSAT) and the legacy Truvi reporting (Bookings, PMS, etc.). Not the scope of this ticket to change it.
* I don't do further propagation, but potentially, this could be extended to New Dash Booking Summary as this source is being shown in the dashboard itself.
# Checklist
- [X] The edited models and dependants run properly with production data.
- [X] The edited models are sufficiently documented.
- [X] The edited models contain PK tests, and I've ran and passed them.
- [X] I have checked for DRY opportunities with other models and docs.
- [X] I've picked the right materialization for the affected models.
# Other
- [ ] Check if a full-refresh is required after this PR is merged.
Related work items: #30415
0021827368