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/G0008/seed/if_freight_calc.intf.abap

@@ -0,0 +1,34 @@
+INTERFACE {{p}}if_freight_calc PUBLIC.
+  TYPES ty_reason TYPE c LENGTH 10.
+  TYPES ty_amount TYPE p LENGTH 9 DECIMALS 2.
+  TYPES ty_weight TYPE p LENGTH 9 DECIMALS 3.
+  TYPES ty_volume TYPE p LENGTH 9 DECIMALS 3.
+  TYPES ty_distance TYPE i.
+  TYPES ty_fuel TYPE p LENGTH 5 DECIMALS 1.
+
+  CONSTANTS:
+    BEGIN OF c_reason,
+      ok       TYPE ty_reason VALUE 'OK',
+      weight   TYPE ty_reason VALUE 'WEIGHT',
+      volume   TYPE ty_reason VALUE 'VOLUME',
+      distance TYPE ty_reason VALUE 'DISTANCE',
+      fuel     TYPE ty_reason VALUE 'FUEL',
+    END OF c_reason.
+
+  TYPES:
+    BEGIN OF ty_result,
+      chargeable_weight TYPE ty_weight,
+      base              TYPE ty_amount,
+      distance          TYPE ty_amount,
+      fuel              TYPE ty_amount,
+      total             TYPE ty_amount,
+      reason            TYPE ty_reason,
+    END OF ty_result.
+
+  METHODS calculate
+    IMPORTING iv_weight_kg     TYPE ty_weight
+              iv_volume_m3     TYPE ty_volume
+              iv_distance_km   TYPE ty_distance
+              iv_fuel_index    TYPE ty_fuel
+    RETURNING VALUE(rs_result) TYPE ty_result.
+ENDINTERFACE.