Merged PR 4076: CIH fees

# Description

Added booking fees for CIH requests and new model of aggregated monthly fee per user

# 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: #26158

models/intermediate/core/schema.yml

@@ -4806,6 +4806,12 @@ models:
               to: ref('stg_core__currency')
               field: id_currency
 
+      - name: currency_code
+        data_type: character varying
+        description: Currency ISO 4217 code used by user.
+        data_tests:
+          - not_null
+
       - name: id_deal
         data_type: text
         description: ""