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/G0102/seed/if_hotel_rate.intf.abap

@@ -0,0 +1,29 @@
+INTERFACE {{p}}if_hotel_rate PUBLIC.
+  TYPES ty_category TYPE c LENGTH 1.
+  TYPES ty_reason   TYPE c LENGTH 10.
+  TYPES ty_amount   TYPE p LENGTH 10 DECIMALS 2.
+  TYPES:
+    BEGIN OF ty_result,
+      reason TYPE ty_reason,
+      price  TYPE ty_amount,
+    END OF ty_result.
+  CONSTANTS:
+    BEGIN OF c_reason,
+      ok       TYPE ty_reason VALUE 'OK',
+      nights   TYPE ty_reason VALUE 'NIGHTS',
+      guests   TYPE ty_reason VALUE 'GUESTS',
+      category TYPE ty_reason VALUE 'CATEGORY',
+    END OF c_reason.
+  CONSTANTS:
+    BEGIN OF c_category,
+      basic   TYPE ty_category VALUE 'S',
+      comfort TYPE ty_category VALUE 'C',
+      suite   TYPE ty_category VALUE 'U',
+    END OF c_category.
+  METHODS calculate
+    IMPORTING iv_category  TYPE ty_category
+              iv_nights    TYPE i
+              iv_guests    TYPE i
+              iv_breakfast TYPE abap_bool
+    RETURNING VALUE(rs_result) TYPE ty_result.
+ENDINTERFACE.