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/G0101/spec.md

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+# 1. Goal
+A car park operator calculates the parking fee of a car. The calculation uses
+the entry time and the exit time of the car. A payment terminal calls the
+calculation before it charges the driver. The terminal needs the fee and a
+reason code for each parking event.
+
+# 2. Open questions
+None.
+
+# 3. Context
+- The interface {{P}}IF_PARK_FEE exists in package $TMP. It is active.
+- The interface contains the type TY_AMOUNT (a packed number, length 8, 2
+decimals), the type TY_REASON (a character field, length 10), the structure
+TY_RESULT with the components REASON (TY_REASON) and FEE (TY_AMOUNT), and the
+constant structure C_REASON with the components OK, BAD_TIME and TOO_LONG.
+- The interface contains one method:
+  CALCULATE
+    IMPORTING iv_entry_date  TYPE d
+              iv_entry_time  TYPE t
+              iv_exit_date   TYPE d
+              iv_exit_time   TYPE t
+              iv_lost_ticket TYPE abap_bool
+              iv_discount    TYPE abap_bool
+    RETURNING VALUE(rs_result) TYPE ty_result.
+
+# 4. Contract
+- Create the class {{P}}PARK_FEE_CALCULATOR in package $TMP.
+- The class is public and final. It has a public constructor without
+  parameters.
+- The class implements the interface {{P}}IF_PARK_FEE.
+- Do not add other public methods.
+
+# 5. Business rules
+The method CALCULATE applies the rules in this sequence. It returns the reason
+and the fee of the first rule that applies.
+1. The duration is the number of whole minutes between the entry and the exit.
+   Ignore the seconds of the two time fields. Example: the entry 10:00:30 and
+   the exit 10:01:20 give the duration 1 minute. The entry 10:00:00 and the
+   exit 10:30:00 give the duration 30 minutes.
+2. If the exit is before the entry, return the reason BAD_TIME and the fee
+   0.00.
+3. If the duration is more than 43200 minutes, return the reason TOO_LONG and
+   the fee 0.00.
+4. If the ticket is lost (iv_lost_ticket = abap_true), the fee is 45.00 and the
+   reason is OK. Rules 5 to 9 do not apply.
+5. If the duration is 15 minutes or less, the fee is 0.00 and the reason is OK.
+6. If the entry date is a Sunday, the fee is 0.00 and the reason is OK.
+7. Else the fee is the number of started hours multiplied by 2.50. A started
+   hour is a full hour or a part of an hour. Example: 61 minutes are 2 started
+   hours and give the fee 5.00. 30 minutes are 1 started hour and give the fee
+   2.50.
+8. If the driver uses the discount card (iv_discount = abap_true), reduce the
+   fee by 25 percent. Round the result to 2 decimals, half up. Example: the fee
+   5.00 becomes 3.75. The fee 2.50 becomes 1.88.
+9. The fee never exceeds 60.00. If the fee is higher, it is 60.00.
+10. The reason is OK.
+
+# 6. Constraints
+- Release target: 8.16.
+- Coding standards: Clean ABAP. Keep every method below 40 statements. Do not
+  use global variables. Do not write comments that restate the code.
+- Out of scope: do not change the interface {{P}}IF_PARK_FEE.
+
+# 7. Acceptance
+- The class is active and has no syntax error.
+- The hidden tests pass.
+- Write your own ABAP Unit tests for the class.