Merged PR 4959: Exclude data from model to improve performance

# Description

Small changes to exclude "irrelevant" data. All data is relevant I guess but this is less.
* Exclude churned accounts after 3 months.
* Exclude any data after 24 months.

# 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.
- [ ] I have checked for DRY opportunities with other models and docs.
- [ ] 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: #28998

models/intermediate/cross/int_mtd_aggregated_metrics_by_deal.sql

@@ -75,3 +75,14 @@ left join
     int_kpis__dimension_daily_accommodation as dda
     on m.date = dda.date
     and m.dimension_value = dda.id_deal
+where
+    -- Only keep data for the last 24 months
+    m.first_day_month + interval '24 months' >= date_trunc('month', current_date)
+    and (
+        -- Display all accounts that have not churned
+        hd.cancellation_date_utc is null
+        -- Display historical information for accounts that have churned. This includes
+        -- any data equal or prior to 3 months after the account has churned.
+        or m.first_day_month
+        <= date_trunc('month', hd.cancellation_date_utc) + interval '3 months'
+    )

models/intermediate/cross/schema.yml

@@ -2616,6 +2616,9 @@ models:
       This model aggregates the historic information of our business by providing
       different metrics at account level (by id_deal).
       Additionally it provides Deal attributes.
+      Metrics displayed in the model range for the past 24 months. Also, churned 
+      accounts are available for historical values, until 3 months after the offboarding 
+      date.
 
     data_tests:
       - dbt_utils.unique_combination_of_columns: