feat(delphi): replay harness H-A — schedule spec+slicer, Python driver, store, step comparer, CLI

[jucor]

commit-id:c9daf6b3

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Stack:

• docs(delphi): overnight session 2026-07-18 — seqbits spec, poller design, journal, plan corrections #2626
• feat(delphi): Python math poller service (phase 1) — Clojure math-container replacement #2625
• fix(delphi): Clojure-parity math writers + committing write path in PostgresClient #2624
• feat(math): in-conv greedy floor + persistent carry (PR-E) #2623
• feat(math): Clojure-exact base-cluster lineage + warm start (PR-C) #2622
• feat(math): replay harness H-B — Clojure Mode A driver (dev/replay.clj) + cross-language comparer shim #2621
• feat(math): group-k-smoother in clojure-legacy engine mode (PR-D smoother) #2620
• feat(math): PCA warm start in clojure-legacy engine mode (PR-B) #2619
• feat(math): add POLISMATH_ENGINE_MODE flag + prev-tick warm-start scaffolding (PR-A) #2618
• feat(delphi): replay harness H-A — schedule spec+slicer, Python driver, store, step comparer, CLI #2617 ⬅
• fix(delphi): cold-start generator copies FULL revote history (no DISTINCT ON dedup) #2616
• fix(math): correct comment-extremity sign in pca_project_cmnts (D1b) #2615
• docs(delphi): add math-algorithm history & routing-regression reference #2613
• fix(math): restore priority-based comment routing (regression from #1961) #2611

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⚠️ Part of a stack created by spr. Do not merge manually using the UI - doing so may have unexpected results.

[jucor]

Closing pull request: commit has gone away

[jucor]

Superseded by #2639 (an spr commit-id mishap force-closed this PR; content and history continue there).