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/G0007/seed/if_loyalty_rules.intf.abap

@@ -0,0 +1,24 @@
+INTERFACE {{p}}if_loyalty_rules PUBLIC.
+  TYPES ty_points TYPE i.
+  TYPES ty_tier TYPE c LENGTH 1.
+
+  CONSTANTS:
+    BEGIN OF c_tier,
+      basic    TYPE ty_tier VALUE 'B',
+      silver   TYPE ty_tier VALUE 'S',
+      gold     TYPE ty_tier VALUE 'G',
+      platinum TYPE ty_tier VALUE 'P',
+    END OF c_tier.
+
+  METHODS get_tier
+    IMPORTING iv_points      TYPE ty_points
+    RETURNING VALUE(rv_tier) TYPE ty_tier.
+
+  METHODS get_discount
+    IMPORTING iv_tier           TYPE ty_tier
+    RETURNING VALUE(rv_percent) TYPE i.
+
+  METHODS points_to_next_tier
+    IMPORTING iv_points        TYPE ty_points
+    RETURNING VALUE(rv_points) TYPE i.
+ENDINTERFACE.