feat(MED-171): update benefits info in company members table

supabase/migrations/20251001011316_update_benefits_usage_calculation.sql

@@ -0,0 +1,30 @@
+DROP FUNCTION IF EXISTS medreport.get_benefits_usages_for_company_members(uuid);
+
+CREATE OR REPLACE FUNCTION medreport.get_benefits_usages_for_company_members(p_account_id uuid)
+returns table (
+    personal_account_id uuid,
+    benefit_amount numeric,
+    benefit_unused_amount numeric
+)
+language plpgsql
+as $$
+begin
+    return query
+        with benefit_recipient_accounts as (
+            -- Find all personal accounts that have received benefits from this company
+            select distinct account_id
+            from medreport.account_balance_entries
+            where source_company_id = p_account_id
+            and entry_type = 'benefit'
+        )
+        select
+            bra.account_id as personal_account_id,
+            coalesce(sum(case when abe.entry_type = 'benefit' and abe.source_company_id = p_account_id then abe.amount else 0 end), 0) as benefit_amount,
+            coalesce(sum(case when abe.entry_type = 'benefit' and abe.source_company_id = p_account_id then abe.amount when abe.entry_type = 'purchase' then abe.amount else 0 end), 0) as benefit_unused_amount
+        from benefit_recipient_accounts bra
+        left join medreport.account_balance_entries abe on abe.account_id = bra.account_id
+        group by bra.account_id;
+end;
+$$;
+
+grant execute on function medreport.get_benefits_usages_for_company_members(uuid) to authenticated, service_role;