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/G1027/spec.md

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+# 1. Goal
+A scaffolding company hires out scaffold parts to building sites. A quotation
+program calls the fee calculation for each hire order before it prints the
+quotation. The program needs the final fee and the long-hire discount of the
+hire order.
+
+# 2. Open questions
+None.
+
+# 3. Context
+- The interface {{P}}IF_HIRE_FEE exists in package $TMP. It is active.
+- The interface has the type TY_AMOUNT (packed, length 8, 2 decimals) and the
+  structure type TY_RESULT with the components FEE and DISCOUNT. Both
+  components have the type TY_AMOUNT.
+- The interface has one method:
+  CALCULATE_FEE
+    IMPORTING iv_days    TYPE i
+              iv_parts   TYPE i
+              iv_express TYPE abap_bool
+    RETURNING VALUE(rs_result) TYPE ty_result.
+
+# 4. Contract
+- Create the class {{P}}SCAFFOLD_FEE in package $TMP.
+- The class is public, final, and has a public constructor without parameters.
+- The class implements {{P}}IF_HIRE_FEE.
+- Do not add other public methods.
+
+# 5. Business rules
+1. The daily rate of one scaffold part is 4.20 EUR.
+2. The base fee is IV_DAYS multiplied by IV_PARTS multiplied by the daily rate.
+3. If IV_EXPRESS is true, the express surcharge is 12 percent of the base fee.
+   Round the express surcharge up to the next full cent.
+4. If IV_DAYS is greater than 30, the long-hire discount is 6 percent of the
+   base fee.
+5. The final fee is the base fee plus the express surcharge minus the long-hire
+   discount.
+6. The result contains the final fee in the component FEE and the long-hire
+   discount in the component DISCOUNT.
+7. The final fee and the discount are amounts in EUR. Each amount is exact to
+   the cent.
+8. If IV_DAYS is not greater than 30, the discount is zero.
+
+# 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: do not change {{P}}IF_HIRE_FEE.
+
+# 7. Acceptance
+- The class is active and has no syntax error.
+- Write your own ABAP Unit tests for the class.