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/G0020/faulty/m1_i_book_revenue.ddls.asddls

@@ -0,0 +1,20 @@
+@AccessControl.authorizationCheck: #NOT_REQUIRED
+@EndUserText.label: 'Book revenue in period'
+define view entity {{P}}I_BOOK_REVENUE
+  with parameters
+    p_from : abap.dats,
+    p_to   : abap.dats
+  as select from {{p}}book as bk
+    inner join   {{p}}sale as sl on sl.book_id <> bk.book_id
+{
+  key bk.book_id                                                 as book_id,
+      bk.title                                                   as title,
+      bk.category                                                as category,
+      sum( sl.quantity )                                         as sold_quantity,
+      sum( cast( sl.quantity as abap.dec( 10, 0 ) ) * bk.price ) as revenue
+}
+where sl.sale_date between $parameters.p_from and $parameters.p_to
+group by
+  bk.book_id,
+  bk.title,
+  bk.category