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/G0009/faulty/m3_shipping_cost_calc.clas.abap

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+CLASS {{p}}shipping_cost_calc DEFINITION PUBLIC FINAL CREATE PUBLIC.
+  PUBLIC SECTION.
+    INTERFACES {{p}}if_shipping_cost.
+
+  PRIVATE SECTION.
+    METHODS base_rate
+      IMPORTING iv_weight      TYPE {{p}}if_shipping_cost=>ty_weight
+      RETURNING VALUE(rv_rate) TYPE {{p}}if_shipping_cost=>ty_amount.
+
+    METHODS express_surcharge
+      IMPORTING iv_rate            TYPE {{p}}if_shipping_cost=>ty_amount
+      RETURNING VALUE(rv_surcharge) TYPE {{p}}if_shipping_cost=>ty_amount.
+ENDCLASS.
+
+
+CLASS {{p}}shipping_cost_calc IMPLEMENTATION.
+  METHOD {{p}}if_shipping_cost~calculate.
+    IF iv_weight <= 0.
+      rv_cost = 0.
+      RETURN.
+    ENDIF.
+
+    DATA(lv_cost) = base_rate( iv_weight ).
+
+    IF iv_express = abap_true.
+      lv_cost = lv_cost + express_surcharge( lv_cost ).
+    ENDIF.
+
+    IF lv_cost < {{p}}if_shipping_cost=>c_rate-min_charge.
+      rv_cost = {{p}}if_shipping_cost=>c_rate-min_charge.
+    ELSE.
+      rv_cost = lv_cost.
+    ENDIF.
+  ENDMETHOD.
+
+  METHOD base_rate.
+    IF iv_weight <= 1.
+      rv_rate = '4.90'.
+    ELSEIF iv_weight <= 5.
+      rv_rate = '8.50'.
+    ELSEIF iv_weight <= 10.
+      rv_rate = '12.00'.
+    ELSEIF iv_weight <= {{p}}if_shipping_cost=>c_rate-bulk_weight.
+      rv_rate = '18.75'.
+    ELSE.
+      DATA(lv_started_kg) = CONV i(
+        ceil( iv_weight - {{p}}if_shipping_cost=>c_rate-bulk_weight ) ).
+      rv_rate = '18.75' - lv_started_kg * {{p}}if_shipping_cost=>c_rate-bulk_step.
+    ENDIF.
+  ENDMETHOD.
+
+  METHOD express_surcharge.
+    rv_surcharge = round( val = iv_rate * {{p}}if_shipping_cost=>c_rate-express_percent / 100
+                          dec = 2 ).
+  ENDMETHOD.
+ENDCLASS.