Generator: pilot analysis and fixes; G0002-G0021 tasks; handover notes merged

- Static bundle checks (name length, seed type, reserved words, contract test classes,
  testclasses_file), local abaplint parser check before SAP, max_tokens, robust JSON parse
- Runner: G2 for CDS views with parameters, contract_check detail in report
- G0020 and G0013 fixed by review and revalidated (oracle 100, null 0)
- Pilot results in docs/faz1-tasarim.md 11e; handover notes merged into CLAUDE.md and docs

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tasks_gen/eval/G0009/seed/shipping_cost_legacy.clas.abap

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+CLASS {{p}}shipping_cost_legacy 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_legacy IMPLEMENTATION.
+  METHOD {{p}}if_shipping_cost~calculate.
+    IF iv_weight <= 0.
+      RETURN.
+    ENDIF.
+
+    rv_cost = base_rate( iv_weight ).
+
+    IF rv_cost < {{p}}if_shipping_cost=>c_rate-min_charge.
+      rv_cost = {{p}}if_shipping_cost=>c_rate-min_charge.
+    ENDIF.
+
+    IF iv_express = abap_true.
+      rv_cost = rv_cost + express_surcharge( rv_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 TYPE i.
+      lv_started_kg = 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.