Retro-shrink the legacy knowledge/log.md essays to true one-liners (terse line + wiki-link)

task-retro-shrink-log-md-one-liners

task confidence inferred status backlog 2026-06-19 owner log-auditor

source forward-deployed-engineer — filed from 0061-defer-curation-tier-off-hot-path (the retro-shrink it explicitly deferred); surfaced + counted by the new soft kb:check log-length lint

Retro-shrink the legacy log.md essays to one-liners

Defer the heavy curation pass off the hot path — terse log stub + kb:check now, pnpm log:audit later established that the why belongs in the atomic ADR and a log.md line is a terse pointer + a wiki-link, and added a soft, warn-only kb:check lint enforcing it going forward. It deliberately did not rewrite the existing essays — that is this task.

The legacy entries (136 over budget at filing, knowledge/log.md ~233 KB) duplicate rationale already captured in knowledge/decisions/ — an SSOT violation. But some entries may hold a why that never made it into their ADR. So the sweep is lossless-first:

For each over-budget entry, diff its prose against the referenced ADR. If the log carries rationale the ADR lacks, move it into the ADR first.
Collapse the log entry to a one-line pointer + a wiki-link.
Keep dated headings and chronology; never change ids or break existing wiki-link targets.
Re-run pnpm kb:check — 0 log-length warnings for [[dossier-log]], and still error-clean (no new link rot).

Optional and non-urgent (the norm is already enforced for new entries; this is hygiene on the back catalogue). Owner is the log-auditor — it is the curator of institutional memory and the natural owner of a rationale-preserving rewrite.