Brummel
ffd18b98ea
Cycle 0070 (streaming sink reductions, #138) close. Durable rationale lifted to the ledger: C8 now records the end-of-stream `finalize` lifecycle (the second node phase beside `eval`), its `Harness::run` topo-order epilogue, and its C1/C7/C8 reconciliation — with the open `Recorder`->`Probe` / per-cycle-allocation question (#77) cross-referenced, since `finalize` is the "non-channel exit" that issue's accumulate-then-read option named as missing. The per-cycle spec and plan are git-rm'd (ephemeral, valid only for their cycle). Audit (architect) found no invariant breakage; noted debt, left as-is: the two-mode `stage1_r_graph` (reduce vs raw sink wiring) rests on the CLI-seam equivalence test rather than structural unification, and `SeriesReducer.last_ts` carries the last *warm* cycle's ts (latent only if `--trace` ever folds). refs #138