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/seed/if_stock_age.intf.abap

@@ -0,0 +1,45 @@
+INTERFACE {{p}}if_stock_age PUBLIC.
+  TYPES:
+    ty_material TYPE c LENGTH 10,
+    ty_batch_id TYPE c LENGTH 10,
+    ty_bucket   TYPE c LENGTH 2,
+    ty_quantity TYPE p LENGTH 13 DECIMALS 3,
+    BEGIN OF ty_batch,
+      material TYPE ty_material,
+      batch    TYPE ty_batch_id,
+      quantity TYPE ty_quantity,
+      gr_date  TYPE dats,
+    END OF ty_batch,
+    tt_batch TYPE STANDARD TABLE OF ty_batch WITH EMPTY KEY,
+    BEGIN OF ty_age_row,
+      material    TYPE ty_material,
+      bucket      TYPE ty_bucket,
+      quantity    TYPE ty_quantity,
+      batch_count TYPE i,
+    END OF ty_age_row,
+    tt_age_row TYPE STANDARD TABLE OF ty_age_row WITH EMPTY KEY,
+    BEGIN OF ty_total,
+      material    TYPE ty_material,
+      quantity    TYPE ty_quantity,
+      batch_count TYPE i,
+    END OF ty_total,
+    tt_total TYPE STANDARD TABLE OF ty_total WITH EMPTY KEY.
+
+  CONSTANTS:
+    BEGIN OF c_bucket,
+      d0_30    TYPE ty_bucket VALUE '01',
+      d31_60   TYPE ty_bucket VALUE '02',
+      d61_90   TYPE ty_bucket VALUE '03',
+      d91_plus TYPE ty_bucket VALUE '04',
+    END OF c_bucket.
+
+  METHODS analyze
+    IMPORTING it_batch      TYPE tt_batch
+              iv_key_date   TYPE dats
+    RETURNING VALUE(rt_age) TYPE tt_age_row.
+
+  METHODS total_by_material
+    IMPORTING it_batch        TYPE tt_batch
+              iv_key_date     TYPE dats
+    RETURNING VALUE(rt_total) TYPE tt_total.
+ENDINTERFACE.