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/G1039/spec.md

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+# 1. Goal
+A tour operator wants a summary of the booking fees of one day. The booking
+program calls one class for each day of the month and shows the summary.
+
+# 2. Open questions
+None.
+
+# 3. Context
+- The interface {{P}}IF_TOUR_SUMMARY exists in package $TMP. It is active.
+- The interface has the types TY_TOUR_TYPE, TY_STATUS, TY_BOOKING, TT_BOOKING
+  and TY_RESULT, the constant structure C_STATUS, and one method:
+  SUMMARIZE IMPORTING it_bookings TYPE tt_booking
+  RETURNING VALUE(rs_result) TYPE ty_result.
+- The booking program passes the bookings of one day to the method.
+- A day can have no bookings.
+
+# 4. Contract
+- Create the class {{P}}TOUR_SUMMARY in package $TMP.
+- The class is public, final, and has a public constructor without parameters.
+- The class implements {{P}}IF_TOUR_SUMMARY.
+- Do not add other public methods.
+
+# 5. Business rules
+1. A tour type is 'C' (classic) or 'P' (premium).
+2. If one booking has a negative number of adults or a negative number of
+   children, the summary is invalid. Return status 'N' and 0 in the fields
+   total_fee, booking_count and average_fee.
+3. If one booking has a tour type that is not 'C' and not 'P', the summary is
+   invalid. Return status 'T' and 0 in the fields total_fee, booking_count and
+   average_fee.
+4. Check rule 2 before rule 3.
+5. The fee of one booking: an adult pays 20.00 for a classic tour and 30.00 for
+   a premium tour. A child pays half of the adult fee of the tour.
+6. If the number of participants of one booking (adults plus children) is 10 or
+   more, reduce the fee of this booking by 10 percent.
+7. Round the fee of each booking to 2 decimals. Round half up.
+8. total_fee is the sum of the fees of all bookings.
+9. booking_count is the number of bookings.
+10. average_fee is total_fee divided by booking_count. Round half up to
+    2 decimals.
+11. If the summary is valid, return status 'O'.
+
+# 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_TOUR_SUMMARY.
+
+# 7. Acceptance
+- The class is active and has no syntax error.
+- The class implements {{P}}IF_TOUR_SUMMARY.
+- Write your own ABAP Unit tests for the class.