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/G0103/spec.md

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+# 1. Goal
+Calculate the overdue fine of a returned library item. The lending desk calls the
+calculation before it prints the receipt. The result gives the days overdue, the
+chargeable days, and the fine.
+
+# 2. Open questions
+None.
+
+# 3. Context
+- Package $TMP contains no object for this task.
+- The class is new. No other object is necessary.
+
+# 4. Contract
+- Create the class {{P}}OVERDUE_FINE in package $TMP.
+- The class is public and final. You can create it with NEW {{P}}OVERDUE_FINE( )
+  without parameters.
+- The class has these public types:
+  - TY_MEDIA: character field, length 8.
+  - TY_AMOUNT: packed number, length 8, 2 decimal places.
+  - TY_RESULT: structure with the components DAYS_OVERDUE (type i),
+    CHARGEABLE_DAYS (type i), and FINE (type TY_AMOUNT).
+- The class has one public method:
+  CALCULATE
+    IMPORTING iv_due_date TYPE d
+              iv_return_date TYPE d
+              iv_media TYPE ty_media
+    RETURNING VALUE(rs_result) TYPE ty_result.
+- Do not add other public methods or public components.
+
+# 5. Business rules
+Apply the rules in this sequence.
+1. If iv_return_date is earlier than or equal to iv_due_date, return
+   DAYS_OVERDUE = 0, CHARGEABLE_DAYS = 0, and FINE = 0.00. Stop.
+2. DAYS_OVERDUE is the number of calendar days from iv_due_date to iv_return_date.
+3. The media code gives the daily rate and the grace days:
+   - BOOK: daily rate 0.30, grace 7 days
+   - DVD: daily rate 1.50, grace 2 days
+   - GAME: daily rate 2.50, grace 0 days
+   Compare the media code exactly. If the media code is not in this list, return
+   CHARGEABLE_DAYS = 0 and FINE = 0.00. Keep DAYS_OVERDUE from rule 2. Stop.
+4. CHARGEABLE_DAYS is DAYS_OVERDUE minus the grace days. If this value is less
+   than 0, CHARGEABLE_DAYS is 0.
+5. FINE is CHARGEABLE_DAYS multiplied by the daily rate.
+6. If DAYS_OVERDUE is greater than 30, add a reminder fee of 5.00 to FINE.
+7. If FINE is greater than 25.00, FINE is 25.00.
+
+# 6. Constraints
+- Release target: SAP_BASIS 816 (ABAP Platform 2025).
+- Coding standards: Clean ABAP. Method length below 40 statements. No global
+  variables. No comment that restates the code.
+- Out of scope: no other object.
+
+# 7. Acceptance
+- The class is active and has no syntax error.
+- The hidden tests pass.
+- Write your own ABAP Unit tests for the class.