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/G0015/reference/bill_age.prog.abap

@@ -0,0 +1,95 @@
+REPORT {{p}}bill_age.
+
+DATA gv_customer TYPE {{p}}bill-customer.
+
+PARAMETERS p_date TYPE d OBLIGATORY.
+SELECT-OPTIONS s_cust FOR gv_customer.
+
+CLASS lcl_report DEFINITION FINAL.
+  PUBLIC SECTION.
+    TYPES:
+      BEGIN OF ty_line,
+        customer       TYPE {{p}}bill-customer,
+        open_count     TYPE i,
+        open_amount    TYPE {{p}}bill-amount,
+        overdue_amount TYPE {{p}}bill-amount,
+      END OF ty_line,
+      tt_line     TYPE STANDARD TABLE OF ty_line WITH EMPTY KEY,
+      tt_customer TYPE RANGE OF {{p}}bill-customer.
+    METHODS select_open_items
+      IMPORTING iv_date         TYPE d
+                it_customer     TYPE tt_customer
+      RETURNING VALUE(rt_lines) TYPE tt_line.
+    METHODS display
+      CHANGING ct_lines TYPE tt_line.
+ENDCLASS.
+
+CLASS lcl_report IMPLEMENTATION.
+  METHOD select_open_items.
+    SELECT customer,
+           COUNT( * )                                                  AS open_count,
+           SUM( amount )                                               AS open_amount,
+           SUM( CASE WHEN due_date < @iv_date THEN amount ELSE 0 END ) AS overdue_amount
+      FROM {{p}}bill
+      WHERE paid <> 'X'
+        AND customer IN @it_customer
+      GROUP BY customer
+      ORDER BY open_amount DESCENDING
+      INTO CORRESPONDING FIELDS OF TABLE @rt_lines.
+  ENDMETHOD.
+
+  METHOD display.
+    TRY.
+        cl_salv_table=>factory( IMPORTING r_salv_table = DATA(lo_alv)
+                                CHANGING  t_table      = ct_lines ).
+        lo_alv->display( ).
+      CATCH cx_salv_msg INTO DATA(lx_error).
+        MESSAGE lx_error TYPE 'I' DISPLAY LIKE 'E'.
+    ENDTRY.
+  ENDMETHOD.
+ENDCLASS.
+
+START-OF-SELECTION.
+  DATA(go_report) = NEW lcl_report( ).
+  DATA(gt_lines) = go_report->select_open_items( iv_date = p_date it_customer = s_cust[] ).
+  go_report->display( CHANGING ct_lines = gt_lines ).
+
+CLASS ltc_report DEFINITION FINAL FOR TESTING DURATION SHORT RISK LEVEL HARMLESS.
+  PRIVATE SECTION.
+    CLASS-DATA go_env TYPE REF TO if_osql_test_environment.
+    CLASS-METHODS class_setup.
+    CLASS-METHODS class_teardown.
+    METHODS open_invoices_only FOR TESTING.
+    METHODS overdue_amount FOR TESTING.
+ENDCLASS.
+
+CLASS ltc_report IMPLEMENTATION.
+  METHOD class_setup.
+    go_env = cl_osql_test_environment=>create( i_dependency_list = VALUE #( ( '{{P}}BILL' ) ) ).
+    DATA lt_bill TYPE STANDARD TABLE OF {{p}}bill WITH EMPTY KEY.
+    lt_bill = VALUE #( ( bill_id = 1 customer = 'A' due_date = '20260101' amount = 10 paid = ' ' )
+                       ( bill_id = 2 customer = 'A' due_date = '20260301' amount = 5  paid = ' ' )
+                       ( bill_id = 3 customer = 'B' due_date = '20260101' amount = 40 paid = 'X' ) ).
+    go_env->insert_test_data( lt_bill ).
+  ENDMETHOD.
+
+  METHOD class_teardown.
+    go_env->destroy( ).
+  ENDMETHOD.
+
+  METHOD open_invoices_only.
+    DATA(lt_lines) = NEW lcl_report( )->select_open_items( iv_date = '20260101'
+                                                           it_customer = VALUE #( ) ).
+    cl_abap_unit_assert=>assert_equals( exp = 1 act = lines( lt_lines ) ).
+    cl_abap_unit_assert=>assert_equals( exp = 'A' act = lt_lines[ 1 ]-customer ).
+    cl_abap_unit_assert=>assert_equals( exp = 2 act = lt_lines[ 1 ]-open_count ).
+    cl_abap_unit_assert=>assert_equals( exp = CONV {{p}}bill-amount( 15 ) act = lt_lines[ 1 ]-open_amount ).
+  ENDMETHOD.
+
+  METHOD overdue_amount.
+    DATA(lt_lines) = NEW lcl_report( )->select_open_items( iv_date = '20260201'
+                                                           it_customer = VALUE #( ) ).
+    cl_abap_unit_assert=>assert_equals( exp = CONV {{p}}bill-amount( 10 )
+                                       act = lt_lines[ 1 ]-overdue_amount ).
+  ENDMETHOD.
+ENDCLASS.