Pipeline controller: plan 2 (hard +, error +50 %), backlog throttle, 2 trajectory workers, stop rules, summaries every 50; budget reserve

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

tasks_gen/train/G1013/spec.md

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+# 1. Goal
+A sawmill plans the cutting of logs. The sawmill receives the log lists of two
+forest districts. A planning program calls one service that combines the two
+lists into one list of logs that are ready for cutting. The program also needs
+the number of logs and the total length for each district.
+
+# 2. Open questions
+None.
+
+# 3. Context
+- The class {{P}}LOG_MERGER does not exist. Create it in package $TMP.
+- A log has a log number, a district, a length in centimetres and a diameter in
+  centimetres.
+- A log number identifies a log. The same log number can occur more than once in
+  one list and in both lists.
+- The caller gives the log lists. The class does not read a database table.
+
+# 4. Contract
+- Create the class {{P}}LOG_MERGER in package $TMP.
+- The class is public and final. It has a public constructor without parameters.
+- Public types of the class:
+  - TY_LOG_NO: character, length 10.
+  - TY_DISTRICT: character, length 4.
+  - TY_LOG: structure with the components LOG_NO (TY_LOG_NO), DISTRICT
+    (TY_DISTRICT), LENGTH_CM (integer) and DIAMETER_CM (integer).
+  - TT_LOG: standard table of TY_LOG with an empty key.
+  - TY_DISTRICT_STAT: structure with the components DISTRICT (TY_DISTRICT),
+    LOG_QTY (integer) and TOTAL_LENGTH_CM (integer).
+  - TT_DISTRICT_STAT: standard table of TY_DISTRICT_STAT with an empty key.
+- Public methods:
+  - COMBINE, importing IT_FIRST (TT_LOG) and IT_SECOND (TT_LOG), returning
+    RT_RESULT (TT_LOG).
+  - COUNT_BY_DISTRICT, importing IT_LOG (TT_LOG), returning RT_STAT
+    (TT_DISTRICT_STAT).
+- Do not add other public methods.
+
+# 5. Business rules
+COMBINE:
+1. Build a merged list. Read IT_FIRST first and IT_SECOND second. Add a log to
+   the merged list only if its log number is not yet in the merged list. Ignore
+   every later log with the same log number.
+2. Remove every log from the merged list with LENGTH_CM below 200 or with
+   DIAMETER_CM below 20.
+3. Sort the result by LOG_NO in ascending order.
+4. The result has no two logs with the same log number.
+
+COUNT_BY_DISTRICT:
+1. The result has one row for each district that occurs in IT_LOG.
+2. LOG_QTY is the number of logs of the district.
+3. TOTAL_LENGTH_CM is the sum of LENGTH_CM of the logs of the district.
+4. Sort the result by DISTRICT in ascending order.
+5. An empty input gives an empty result.
+
+# 6. Constraints
+- Release target: ABAP Platform 2025 (SAP_BASIS 816).
+- Coding standards: Clean ABAP. Methods below 40 statements. No global
+  variables. No comment that restates the code.
+- Out of scope: do not create other objects.
+
+# 7. Acceptance
+- The class is active and has no syntax error.
+- The hidden tests pass.
+- Write your own ABAP Unit tests for the class.