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/G0112/spec.md

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+# 1. Goal
+Show the waste collection cost for each district and waste type in an ALV list.
+The waste team uses the list to compare the costs of a period.
+
+# 2. Open questions
+None.
+
+# 3. Context
+- Table {{P}}PICKUP exists in package $TMP. It contains data.
+  Fields: PICKUP_ID (INT4, key), DISTRICT (CHAR 4), WASTE_TYPE (CHAR 10),
+  PICKUP_DATE (DATS), WEIGHT_KG (DEC 15,2).
+- Table {{P}}PRICE exists in package $TMP. It contains data.
+  Fields: WASTE_TYPE (CHAR 10, key), PRICE_PER_KG (DEC 15,2).
+
+# 4. Contract
+- Create the executable program {{P}}WASTE_COST in package $TMP.
+- Selection screen:
+  - Parameter P_FROM, type DATS, mandatory: the first pickup date to include.
+  - Parameter P_TO, type DATS, mandatory: the last pickup date to include.
+  - Select-option S_DIST for the district.
+- Show the result with CL_SALV_TABLE. The output table has these columns, with
+  these names and these types:
+  - DISTRICT, type {{P}}PICKUP-DISTRICT.
+  - WASTE_TYPE, type {{P}}PICKUP-WASTE_TYPE.
+  - WEIGHT, type {{P}}PICKUP-WEIGHT_KG.
+  - COST, type {{P}}PRICE-PRICE_PER_KG.
+
+# 5. Business rules
+1. Include a pickup only if PICKUP_DATE is on or after P_FROM and on or before
+   P_TO.
+2. Include a pickup only if its DISTRICT is in S_DIST. If S_DIST is empty,
+   include every district.
+3. The cost of a pickup is WEIGHT_KG multiplied by the PRICE_PER_KG of its
+   waste type. Each waste type in {{P}}PICKUP has exactly one row in
+   {{P}}PRICE.
+4. Show one line for each combination of DISTRICT and WASTE_TYPE that has at
+   least one included pickup.
+5. WEIGHT is the sum of the WEIGHT_KG values of the included pickups of the
+   line.
+6. COST is the sum of the costs of the included pickups of the line. Round
+   COST to 2 decimal places. Round half up.
+7. Sort the lines by COST, the highest cost first. If two lines have the same
+   COST, sort them by DISTRICT in ascending order and then by WASTE_TYPE in
+   ascending order.
+8. If no pickup is included, the list is empty.
+
+# 6. Constraints
+- Release target: 8.16.
+- Coding standards: Clean ABAP. Read the data with one database access.
+- Out of scope: do not change {{P}}PICKUP and {{P}}PRICE.
+
+# 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.