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/G0128/reference/cx_licence_invalid.clas.abap

@@ -0,0 +1,12 @@
+CLASS {{p}}cx_licence_invalid DEFINITION
+  PUBLIC
+  INHERITING FROM cx_static_check
+  FINAL
+  CREATE PUBLIC.
+
+  PUBLIC SECTION.
+ENDCLASS.
+
+
+CLASS {{p}}cx_licence_invalid IMPLEMENTATION.
+ENDCLASS.