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/G0114/spec.md

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+# 1. Goal
+A courier company dispatches deliveries. Each delivery belongs to a district. The
+dispatcher needs one service that groups the deliveries per district, and one
+service that merges two district plans. A planning program calls both services.
+
+# 2. Open questions
+None.
+
+# 3. Context
+- The class {{P}}DISPATCH_PLANNER does not exist. Create it in package $TMP.
+- A delivery has an ID, a district code, a number of parcels, a weight and an
+  urgency. A small urgency value means a high urgency.
+- A district plan has one line per district.
+- The planning program reads the deliveries of one day and calls PLAN.
+- A second depot sends its own plan. The dispatcher calls MERGE with the plan of
+  the first depot and the plan of the second depot.
+
+# 4. Contract
+- Create the class {{P}}DISPATCH_PLANNER in package $TMP.
+- The class is public and final. It has a public constructor without parameters.
+- The class has the public methods PLAN and MERGE. It has no other public method.
+- Public types of the class:
+  - TY_DELIVERY with the components DELIVERY_ID (character 10), DISTRICT
+    (character 4), PARCELS (integer), WEIGHT (packed number, length 8, 2
+    decimals) and URGENCY (integer).
+  - TT_DELIVERY: a standard table of TY_DELIVERY with an empty key.
+  - TY_DISTRICT with the components DISTRICT (character 4), DELIVERIES
+    (integer), PARCELS (integer), WEIGHT (packed number, length 8, 2 decimals)
+    and TOP_URGENCY (integer).
+  - TT_DISTRICT: a standard table of TY_DISTRICT with an empty key.
+- Method PLAN:
+  IMPORTING it_delivery TYPE tt_delivery
+  RETURNING VALUE(rt_district) TYPE tt_district.
+- Method MERGE:
+  IMPORTING it_left TYPE tt_district
+            it_right TYPE tt_district
+  RETURNING VALUE(rt_merged) TYPE tt_district.
+
+# 5. Business rules
+Method PLAN:
+1. Ignore each delivery whose PARCELS value is zero or negative.
+2. Group the other deliveries by DISTRICT. Compare the district codes exactly.
+3. Each district has exactly one line in the result:
+   - DELIVERIES: the number of deliveries of the district.
+   - PARCELS: the sum of the parcels of the deliveries of the district.
+   - WEIGHT: the sum of the weights of the deliveries of the district.
+   - TOP_URGENCY: the smallest urgency of the deliveries of the district.
+4. Sort the result by DISTRICT in ascending order.
+5. If no delivery remains, the result is empty.
+
+Method MERGE:
+6. A district that occurs in both plans has exactly one line in the result:
+   - DELIVERIES, PARCELS and WEIGHT: the sum of the two values.
+   - TOP_URGENCY: the smaller of the two values.
+7. A district that occurs in only one plan keeps its values.
+8. Sort the result by DISTRICT in ascending order.
+9. If both plans are empty, the result is empty.
+
+# 6. Constraints
+- Release target: 8.16.
+- Coding standards: Clean ABAP. Method length below 40 statements. No global
+  variables. No comment that restates the code.
+- Out of scope: no other global object in package $TMP.
+
+# 7. Acceptance
+- The class is active and has no syntax error.
+- The hidden tests pass.
+- Write your own ABAP Unit tests for the class.