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/if_shipping_cost.intf.abap

@@ -0,0 +1,17 @@
+INTERFACE {{p}}if_shipping_cost PUBLIC.
+  TYPES ty_weight TYPE p LENGTH 13 DECIMALS 3.
+  TYPES ty_amount TYPE p LENGTH 15 DECIMALS 2.
+
+  CONSTANTS:
+    BEGIN OF c_rate,
+      min_charge      TYPE ty_amount VALUE '6.00',
+      express_percent TYPE i         VALUE 35,
+      bulk_weight     TYPE ty_weight VALUE '31.500',
+      bulk_step       TYPE ty_amount VALUE '0.65',
+    END OF c_rate.
+
+  METHODS calculate
+    IMPORTING iv_weight      TYPE ty_weight
+              iv_express     TYPE abap_bool
+    RETURNING VALUE(rv_cost) TYPE ty_amount.
+ENDINTERFACE.