Merged PR 3671: Refactor new dash user overview

# Description

This query refactors the model `int_core__new_dash_user_overview` to optimize performance.

The output of the model remains unaltered.

The performance gains are obtained by preventing a monster-grade intermediate join with almost 100 million rows + a sequential order that the current `master` model causes. This refactor breaks down the query that caused that into multiple CTEs that pre-aggregate results, avoiding the dimensional explosion.

# 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

models/intermediate/core/int_core__new_dash_user_overview.sql

@@ -11,31 +11,34 @@ with
     int_core__accommodation_to_product_bundle as (
         select * from {{ ref("int_core__accommodation_to_product_bundle") }}
     ),
-
-    user_aggregation as (
-
+    upb_aggregation as (
         select
             upb.id_user_host,
-            uh.id_deal,
-            uh.new_dash_version as user_migration_phase,
-            uh.user_in_new_dash_since_date_utc as user_estimated_migration_date_utc,
-            uh.company_name,
-            uh.first_name,
-            uh.last_name,
-            uh.email,
-            uh.account_currency_iso4217 as account_currency,
             count(distinct upb.id_user_product_bundle) as total_user_product_bundles,
             count(
                 distinct case
                     when upb.has_no_end_date then upb.id_user_product_bundle else null
                 end
-            ) as total_active_user_product_bundles,
+            ) as total_active_user_product_bundles
+        from int_core__user_product_bundle upb
+        group by 1
+    ),
+    accommodation_aggregation as (
+        select
+            upb.id_user_host,
             count(distinct a.id_accommodation) as total_listings,
             count(
                 distinct case
                     when a.is_active = true then a.id_accommodation else null
                 end
-            ) as total_active_listings,
+            ) as total_active_listings
+        from int_core__user_product_bundle upb
+        left join int_core__accommodation a on upb.id_user_host = a.id_user_host
+        group by 1
+    ),
+    atpb_aggregation as (
+        select
+            upb.id_user_host,
             count(
                 distinct case
                     when
@@ -54,7 +57,16 @@ with
                     then atpb.id_accommodation
                     else null
                 end
-            ) as total_listings_with_active_product_bundle_with_paid_service,
+            ) as total_listings_with_active_product_bundle_with_paid_service
+        from int_core__user_product_bundle upb
+        left join
+            int_core__accommodation_to_product_bundle atpb
+            on upb.id_user_product_bundle = atpb.id_user_product_bundle
+        group by 1
+    ),
+    btpb_aggregation as (
+        select
+            upb.id_user_host,
             count(distinct btpb.id_booking) as total_bookings_with_product_bundle,
             count(
                 distinct case
@@ -66,16 +78,35 @@ with
                 end
             ) as total_bookings_with_product_bundle_with_paid_service
         from int_core__user_product_bundle upb
-        inner join int_core__user_host uh on upb.id_user_host = uh.id_user_host
         left join
             int_core__booking_to_product_bundle btpb
             on upb.id_user_product_bundle = btpb.id_user_product_bundle
-        left join int_core__accommodation a on upb.id_user_host = a.id_user_host
-        left join
-            int_core__accommodation_to_product_bundle atpb
-            on upb.id_user_product_bundle = atpb.id_user_product_bundle
-        group by 1, 2, 3, 4, 5, 6, 7, 8, 9
-
+        group by 1
+    ),
+    user_aggregation as (
+        select
+            upb.id_user_host,
+            uh.id_deal,
+            uh.new_dash_version as user_migration_phase,
+            uh.user_in_new_dash_since_date_utc as user_estimated_migration_date_utc,
+            uh.company_name,
+            uh.first_name,
+            uh.last_name,
+            uh.email,
+            uh.account_currency_iso4217 as account_currency,
+            upb.total_user_product_bundles,
+            upb.total_active_user_product_bundles,
+            a.total_listings,
+            a.total_active_listings,
+            atpb.total_listings_with_product_bundle_with_paid_service,
+            atpb.total_listings_with_active_product_bundle_with_paid_service,
+            btpb.total_bookings_with_product_bundle,
+            btpb.total_bookings_with_product_bundle_with_paid_service
+        from upb_aggregation upb
+        left join accommodation_aggregation a on upb.id_user_host = a.id_user_host
+        left join atpb_aggregation atpb on upb.id_user_host = atpb.id_user_host
+        left join btpb_aggregation btpb on upb.id_user_host = btpb.id_user_host
+        left join int_core__user_host uh on upb.id_user_host = uh.id_user_host
     )
 select
     id_user_host,