Merged PR 5342: Booking Summary - add months

# Description

Adds the month equivalent for creation, check in and check out dates for Booking Summary, for reporting purposes

# 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: #30609

models/reporting/general/new_dash_booking_summary.sql

@@ -16,6 +16,9 @@ select
     b.booking_created_date_utc as booking_created_date_utc,
     b.booking_check_in_date_utc as booking_check_in_date_utc,
     b.booking_check_out_date_utc as booking_check_out_date_utc,
+    date_trunc('month', b.booking_created_date_utc)::date as booking_created_month,
+    date_trunc('month', b.booking_check_in_date_utc)::date as booking_check_in_month,
+    date_trunc('month', b.booking_check_out_date_utc)::date as booking_check_out_month,
     b.booking_number_of_nights as booking_number_of_nights,
     b.host_currency_code as host_currency_code,
     b.new_dash_version as new_dash_version,

models/reporting/general/schema.yml

@@ -560,6 +560,29 @@ models:
         data_tests:
           - not_null
 
+      - name: booking_created_month
+        data_type: date
+        description: |
+          First day of the month of when the Booking record was 
+          created in the Backend. Cannot be null.
+        data_tests:
+          - not_null
+
+      - name: booking_check_in_month
+        data_type: timestamp
+        description: |
+          First day of the month of the Check-in of the Booking.
+          Cannot be null.
+        data_tests:
+          - not_null
+
+      - name: booking_check_out_month
+        data_type: date
+        description: |
+          First day of the month of the Check-out of the Booking.
+        data_tests:
+          - not_null
+
       - name: booking_number_of_nights
         data_type: integer
         description: |