loop: clarity pass (Codex)

[rusholme]

Clarity and streamlining pass by Codex (gpt-6-astra, effort high), run unattended for Ben ("Unattended codex refinement of writing", 2026-09-28).

system/loop.md

Codex summary:

Rewrote only system/loop.md, shortening it by about 12%.
Reordered release binding and clarified processing, catalog selection, and recovery.
Preserved facts, identifiers, references, headings, tables, and TOML.
Preservation and whitespace checks passed; no em dashes remain.
Retained contradictions: per-date versus per-batch runs, promotion, failed-row handling, and 21600 seconds versus two 4.5-hour dates.

Words: 3408 -> 3011.
Fact check (scripted: labels, ref and link targets, URLs, backticked spans, code lines, integers, dated rulings): 1 item(s) missing after the rewrite, 1 restore call(s); none missing against the current tip.

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