Mutation check done on all accepted tasks; mutant fixes; dump filter in proxy

- skip sy-subrc lines and CDS type lengths; CDS literal mutants; mutate helper classes
- proxy: sap_short_dumps shows only dumps of the current run
- 26/26 tasks pass; results in docs/faz1-tasarim.md 11g

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014aUaQeLnwbb1zTpN7kHeat

tasks_gen/eval/G0018/faulty/m1_i_order.ddls.asddls

@@ -0,0 +1,15 @@
+@AccessControl.authorizationCheck: #NOT_REQUIRED
+@EndUserText.label: 'Open orders with customer data'
+define view entity {{P}}I_ORDER
+  as select from {{p}}ord as ord
+    association [0..1] to {{p}}cust as _Customer
+      on $projection.cust_id = _Customer.cust_id
+{
+  key ord.order_id,
+      ord.cust_id,
+      ord.order_date,
+      _Customer.cust_name as customer_name,
+      _Customer.country   as country,
+      _Customer
+}
+where ord.status <> 'O'