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/G0130/reference/cx_presc_error.clas.abap

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+CLASS {{p}}cx_presc_error DEFINITION
+  PUBLIC
+  INHERITING FROM cx_root
+  FINAL
+  CREATE PUBLIC.
+
+  PUBLIC SECTION.
+    TYPES ty_reason TYPE c LENGTH 12.
+
+    CONSTANTS:
+      BEGIN OF c_reason,
+        empty     TYPE ty_reason VALUE 'EMPTY',
+        expired   TYPE ty_reason VALUE 'EXPIRED',
+        quantity  TYPE ty_reason VALUE 'QUANTITY',
+        unknown   TYPE ty_reason VALUE 'UNKNOWN',
+        dose      TYPE ty_reason VALUE 'DOSE',
+        duplicate TYPE ty_reason VALUE 'DUPLICATE',
+      END OF c_reason.
+
+    METHODS constructor
+      IMPORTING iv_reason TYPE ty_reason.
+
+    METHODS get_reason
+      RETURNING VALUE(rv_reason) TYPE ty_reason.
+
+    METHODS get_message_text
+      RETURNING VALUE(rv_text) TYPE string.
+
+  PRIVATE SECTION.
+    DATA mv_reason TYPE ty_reason.
+ENDCLASS.
+
+
+CLASS {{p}}cx_presc_error IMPLEMENTATION.
+  METHOD constructor.
+    super->constructor( ).
+    mv_reason = iv_reason.
+  ENDMETHOD.
+
+  METHOD get_reason.
+    rv_reason = mv_reason.
+  ENDMETHOD.
+
+  METHOD get_message_text.
+    CASE mv_reason.
+      WHEN c_reason-empty.
+        rv_text = 'The prescription has no items'.
+      WHEN c_reason-expired.
+        rv_text = 'The prescription is expired'.
+      WHEN c_reason-quantity.
+        rv_text = 'The quantity is not positive'.
+      WHEN c_reason-unknown.
+        rv_text = 'The drug is not in the drug master'.
+      WHEN c_reason-dose.
+        rv_text = 'The daily dose is not allowed'.
+      WHEN c_reason-duplicate.
+        rv_text = 'The drug appears more than once'.
+    ENDCASE.
+  ENDMETHOD.
+ENDCLASS.