fix: relocate memory-lint + scanner runtime output out of .abcd/logbook (iss-73)

[REPPL]

What

.abcd/logbook/ is a retired runtime-output location (iss-36/iss-56). The
2026-07-12 maintainer adjudication placed runtime artefacts in the gitignored
.abcd/.work.local/logs/ tier. Two Go sites still named the retired location:

• memory lint wrote its report dir under .abcd/logbook/memory/ (lint.go)
• the PII scanner's defaultSkipFragments referenced .abcd/logbook/pii-scan/
  and .abcd/logbook/audit-history/ (scanner.go)

Both now use .abcd/.work.local/logs/.

Detector-first

TestNoRetiredLogbookLocationInSource walks internal/ and fails if any non-test
Go source names the retired logbook location. Watched it flag both sites, then
pass after the relocation.

Transparent / safe

No reader hardcoded the old path — memory lint returns ReportDir; the scanner
uses the fragments only to skip its own output. Security review: PROMOTE, and
it flagged the change as a net improvement — the old .abcd/logbook/ was not
gitignored (a publishable-yet-skipped path), while the new tier is gitignored, so
the launch bundle excludes it before the scanner runs.

Review-driven fix

Correctness review FIX-FIRST: commands/abcd/memory.md (the shipped plugin doc
for this verb) still named the old path — updated to the new one.

Scope note (deferred)

Arming the .abcd/logbook record-lint markdown ban (iss-36/iss-56) is a
separate follow-up: record-lint scans .abcd/development/**/*.md, where several
research notes still reference the path (some historical, one current, plus an
unimplemented publish spec). That markdown reconciliation is out of scope here
and will be tracked/captured on main. iss-56 (logbook) resolution is likewise
deferred to the ledger-cleanup pass (it shares an id with a second issue —
iss-74).

make preflight green. Part of drain #2. Chain: branched from main;
independent of iss-76/iss-79.

Assisted-by: Claude:claude-opus-4-8