Merged PR 4354: ***ing decimals

# Description

It was the amount of decimals the values had because of the exchange rates apparently causing error in PBI

# Checklist

- [x] The edited models and dependants run properly with production data.
- [ ] The edited models are sufficiently documented.
- [ ] 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.

***ing decimals

Related work items: #27178

models/intermediate/core/int_core__waiver_fees.sql

@@ -33,15 +33,18 @@ select
     case
         when pa.id_payaway_plan is not null
         then
+            (
                 p.amount - greatest(
                     p.amount * pa.payaway_percentage,
                     pa.payaway_minimum_commission_local_curr * cer.rate
                 )
+            )::decimal(19, 4)
         else 0
     end as amount_due_to_host_in_txn_currency,
     case
         when pa.id_payaway_plan is not null
         then
+            (
                 (
                     p.amount - greatest(
                         p.amount * pa.payaway_percentage,
@@ -49,20 +52,24 @@ select
                     )
                 )
                 * ser.rate
+            )::decimal(19, 4)
         else 0
     end as amount_due_to_host_in_gbp,
-    case
-        when pa.id_payaway_plan is not null
-        then
-            greatest(
-                p.amount * pa.payaway_percentage,
-                pa.payaway_minimum_commission_local_curr * cer.rate
-            )
-        else p.amount
-    end as superhog_fee_in_txn_currency,
     case
         when pa.id_payaway_plan is not null
         then
+            (
+                greatest(
+                    p.amount * pa.payaway_percentage,
+                    pa.payaway_minimum_commission_local_curr * cer.rate
+                )
+            )::decimal(19, 4)
+        else p.amount
+    end as superhog_fee_in_txn_currency,
+    case
+        when pa.id_payaway_plan is not null
+        then
+            (
                 (
                     greatest(
                         p.amount * pa.payaway_percentage,
@@ -70,7 +77,8 @@ select
                     )
                 )
                 * ser.rate
-        else p.amount * ser.rate
+            )::decimal(19, 4)
+        else (p.amount * ser.rate)::decimal(19, 4)
     end as superhog_fee_in_gbp
 from stg_core__verification_to_payment vtp
 left join stg_core__payment p on vtp.id_payment = p.id_payment