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/G0125/spec.md

@@ -0,0 +1,43 @@
+# 1. Goal
+A regional airport collects the movements of its flights. The operations team
+needs a report that shows, for each destination, how many flights went there
+and how many passengers they carried.
+
+# 2. Open questions
+None.
+
+# 3. Context
+- Table {{P}}FLIGHT exists in package $TMP. It contains data.
+  Fields: FLIGHT_ID (INT4, key), DEST (CHAR 3), FLIGHT_DATE (DATS), PAX (INT4).
+- Table {{P}}AIRPORT exists in package $TMP. It contains data.
+  Fields: AIRPORT (CHAR 3, key), NAME (CHAR 40).
+
+# 4. Contract
+- Create the executable program {{P}}FLIGHT_SUM in package $TMP.
+- Selection screen:
+  - Parameter P_FROM, type DATS, mandatory: the first flight date to include.
+  - Select-option S_DEST for the destination.
+- Show the result with CL_SALV_TABLE. The output table has these columns, with
+  these names: DEST, NAME, FLIGHTS (number of flights), PAX (sum of the
+  passengers).
+
+# 5. Business rules
+1. Include a flight only if FLIGHT_DATE is on or after P_FROM and DEST is in
+   S_DEST.
+2. Show one line for each destination that has at least one included flight.
+3. NAME is the airport name of the destination from {{P}}AIRPORT. If the
+   destination has no entry in {{P}}AIRPORT, NAME is 'UNKNOWN'.
+4. FLIGHTS is the number of included flights of the destination. PAX is the sum
+   of the passengers of the included flights.
+5. Sort the lines by PAX, the highest first. If two lines have the same PAX,
+   sort them by DEST in ascending order.
+
+# 6. Constraints
+- Release target: 8.16.
+- Coding standards: Clean ABAP.
+- Out of scope: do not change {{P}}FLIGHT and {{P}}AIRPORT.
+
+# 7. Acceptance
+- The program is active and has no syntax error.
+- The hidden tests pass.
+- Write ABAP Unit tests as local test classes in the program.