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/G0004/reference/stock_age.clas.abap

@@ -0,0 +1,92 @@
+CLASS {{p}}stock_age DEFINITION PUBLIC FINAL CREATE PUBLIC.
+  PUBLIC SECTION.
+    INTERFACES {{p}}if_stock_age.
+
+  PRIVATE SECTION.
+    TYPES tt_age_group TYPE HASHED TABLE OF {{p}}if_stock_age=>ty_age_row
+      WITH UNIQUE KEY material bucket.
+    TYPES tt_total_group TYPE HASHED TABLE OF {{p}}if_stock_age=>ty_total
+      WITH UNIQUE KEY material.
+
+    METHODS age_in_days
+      IMPORTING is_batch      TYPE {{p}}if_stock_age=>ty_batch
+                iv_key_date   TYPE dats
+      RETURNING VALUE(rv_age) TYPE i.
+
+    METHODS bucket_of
+      IMPORTING iv_age           TYPE i
+      RETURNING VALUE(rv_bucket) TYPE {{p}}if_stock_age=>ty_bucket.
+ENDCLASS.
+
+
+CLASS {{p}}stock_age IMPLEMENTATION.
+
+  METHOD {{p}}if_stock_age~analyze.
+    DATA lt_group TYPE tt_age_group.
+
+    LOOP AT it_batch INTO DATA(ls_batch).
+      DATA(lv_age) = age_in_days( is_batch = ls_batch iv_key_date = iv_key_date ).
+      IF lv_age < 0.
+        CONTINUE.
+      ENDIF.
+
+      DATA(lv_bucket) = bucket_of( lv_age ).
+      ASSIGN lt_group[ material = ls_batch-material
+                       bucket   = lv_bucket ] TO FIELD-SYMBOL(<ls_group>).
+      IF sy-subrc <> 0.
+        INSERT VALUE #( material = ls_batch-material bucket = lv_bucket )
+               INTO TABLE lt_group.
+        ASSIGN lt_group[ material = ls_batch-material
+                         bucket   = lv_bucket ] TO <ls_group>.
+      ENDIF.
+
+      <ls_group>-quantity = <ls_group>-quantity + ls_batch-quantity.
+      <ls_group>-batch_count = <ls_group>-batch_count + 1.
+    ENDLOOP.
+
+    rt_age = lt_group.
+    SORT rt_age BY material bucket.
+  ENDMETHOD.
+
+  METHOD {{p}}if_stock_age~total_by_material.
+    DATA lt_group TYPE tt_total_group.
+
+    LOOP AT it_batch INTO DATA(ls_batch).
+      IF age_in_days( is_batch = ls_batch iv_key_date = iv_key_date ) < 0.
+        CONTINUE.
+      ENDIF.
+
+      ASSIGN lt_group[ material = ls_batch-material ] TO FIELD-SYMBOL(<ls_group>).
+      IF sy-subrc <> 0.
+        INSERT VALUE #( material = ls_batch-material ) INTO TABLE lt_group.
+        ASSIGN lt_group[ material = ls_batch-material ] TO <ls_group>.
+      ENDIF.
+
+      <ls_group>-quantity = <ls_group>-quantity + ls_batch-quantity.
+      <ls_group>-batch_count = <ls_group>-batch_count + 1.
+    ENDLOOP.
+
+    rt_total = lt_group.
+    SORT rt_total BY material.
+  ENDMETHOD.
+
+  METHOD age_in_days.
+    IF is_batch-gr_date IS INITIAL OR is_batch-gr_date > iv_key_date.
+      rv_age = -1.
+    ELSE.
+      rv_age = iv_key_date - is_batch-gr_date.
+    ENDIF.
+  ENDMETHOD.
+
+  METHOD bucket_of.
+    IF iv_age <= 30.
+      rv_bucket = {{p}}if_stock_age=>c_bucket-d0_30.
+    ELSEIF iv_age <= 60.
+      rv_bucket = {{p}}if_stock_age=>c_bucket-d31_60.
+    ELSEIF iv_age <= 90.
+      rv_bucket = {{p}}if_stock_age=>c_bucket-d61_90.
+    ELSE.
+      rv_bucket = {{p}}if_stock_age=>c_bucket-d91_plus.
+    ENDIF.
+  ENDMETHOD.
+ENDCLASS.