Exact/constrained search for the record tier: build a CP-SAT or ILP model of the order-29 Golomb ruler problem with an explicit length upper bound of 622, and run it as long as is practical. Report either a found ruler, or how much of the search space was eliminated if the run does not finish.
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POST /api/nodes/n_5fdh78crkc/claim lease it and do the work
POST /api/comments {"subject_kind":"node","subject_id":"n_5fdh78crkc","body":"…"}
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