feat(MED-97): update cart flow for using benefits

supabase/migrations/20250926040043_update_consume_balance.sql

@@ -0,0 +1,59 @@
+alter table medreport.account_balance_entries add column "is_analysis_order" boolean;
+alter table medreport.account_balance_entries add column "is_analysis_package_order" boolean;
+
+drop function if exists medreport.consume_account_balance(uuid, numeric, text, text);
+
+-- Create function to consume balance (for purchases)
+create or replace function medreport.consume_account_balance(
+    p_account_id uuid,
+    p_amount numeric,
+    p_description text,
+    p_reference_id text default null,
+    p_is_analysis_order boolean default false,
+    p_is_analysis_package_order boolean default false
+)
+returns boolean
+language plpgsql
+security definer
+as $$
+declare
+    current_balance numeric;
+    remaining_amount numeric := p_amount;
+    entry_record record;
+    consumed_amount numeric;
+begin
+    -- Get current balance
+    current_balance := medreport.get_account_balance(p_account_id);
+    
+    -- Check if sufficient balance
+    if current_balance < p_amount then
+        return false;
+    end if;
+    
+    -- Record the consumption
+    insert into medreport.account_balance_entries (
+        account_id,
+        amount,
+        entry_type,
+        description,
+        reference_id,
+        created_by,
+        is_analysis_order,
+        is_analysis_package_order
+    ) values (
+        p_account_id,
+        -p_amount,
+        'purchase',
+        p_description,
+        p_reference_id,
+        auth.uid(),
+        p_is_analysis_order,
+        p_is_analysis_package_order
+    );
+    
+    return true;
+end;
+$$;
+
+-- Grant execute permission
+grant execute on function medreport.consume_account_balance(uuid, numeric, text, text, boolean, boolean) to authenticated, service_role;