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/G1019/spec.md

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+# 1. Goal
+Calculate the fee of a bowling lane booking. A checkout program calls the
+calculation before it takes the payment. The program needs one fee for each
+booking.
+
+# 2. Open questions
+None.
+
+# 3. Context
+- The interface {{P}}IF_BOWLING_FEE exists in package $TMP. It is active.
+- The interface has the type TY_FEE (P LENGTH 8 DECIMALS 2) and one method:
+  CALCULATE_FEE IMPORTING iv_lanes TYPE i, iv_hours TYPE i, iv_shoes TYPE i
+  RETURNING VALUE(rv_fee) TYPE ty_fee.
+- The checkout program gives the number of lanes, the number of hours, and the
+  number of pairs of shoes of the booking.
+
+# 4. Contract
+- Create the class {{P}}BOWLING_FEE in package $TMP.
+- The class is public, final, and has a public constructor without parameters.
+- The class implements {{P}}IF_BOWLING_FEE.
+- Do not add other public methods.
+
+# 5. Business rules
+1. The lane fee is 12.00 EUR for each lane and each hour.
+2. The shoe rental is 2.50 EUR for each pair of shoes.
+3. A booking of more than 4 lanes is a group booking.
+4. A booking of more than 3 hours is a large booking.
+5. A group booking gets a discount of 10 % on the lane fee.
+6. A large booking gets a discount of 20 % on the lane fee.
+7. A booking gets exactly one discount.
+8. The shoe rental is never discounted.
+9. If the number of lanes is zero or less, or if the number of hours is zero or
+   less, the lane fee is zero.
+10. If the number of pairs of shoes is zero or less, the shoe rental is zero.
+11. The fee is the lane fee after the discount plus the shoe rental.
+
+# 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_BOWLING_FEE.
+
+# 7. Acceptance
+- The class is active and has no syntax error.
+- Write your own ABAP Unit tests for the class.