Fix coverage with several contract classes; table annotation and file path checks; clean task dir on write

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014aUaQeLnwbb1zTpN7kHeat

tasks_gen/eval/G0126/reference/cx_bag_limit.clas.abap

@@ -0,0 +1,13 @@
+CLASS {{p}}cx_bag_limit DEFINITION PUBLIC FINAL CREATE PUBLIC INHERITING FROM cx_static_check.
+  PUBLIC SECTION.
+    DATA mv_text TYPE string READ-ONLY.
+    METHODS constructor.
+ENDCLASS.
+
+
+CLASS {{p}}cx_bag_limit IMPLEMENTATION.
+  METHOD constructor.
+    super->constructor( ).
+    mv_text = 'Bag limit reached'.
+  ENDMETHOD.
+ENDCLASS.