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/G0105/reference/toll_fee.func.abap

@@ -0,0 +1,20 @@
+FUNCTION {{p}}toll_fee
+  IMPORTING
+    iv_distance_km  TYPE decfloat34
+    iv_weight_class TYPE i
+    iv_axles        TYPE i
+  EXPORTING
+    ev_fee          TYPE decfloat34
+  EXCEPTIONS
+    invalid_input.
+
+  TRY.
+      ev_fee = NEW {{p}}toll_calc( )->calculate(
+        iv_distance_km  = iv_distance_km
+        iv_weight_class = iv_weight_class
+        iv_axles        = iv_axles ).
+    CATCH cx_abap_invalid_value.
+      RAISE invalid_input.
+  ENDTRY.
+
+ENDFUNCTION.