docs(changelog): the S162 review's six majors as known issues (operator decision 51), and the matcher residual's full reach

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -321,7 +321,30 @@ warning per step whose `Files:` names a path that is not backticked.
 - The matcher's residual (review `4ab24b07`; operator decision 50, 16.10): a
   previous finding marked resolved by every raiser and re-reported in other
   words (content overlap below 0.7) on an unchanged line is a new finding,
-  which rule A can lower to minor.
+  which rule A can lower to minor. The same holds for a re-report in the same
+  short words (fewer than 6 content words) away from the previous finding's
+  place.
+- A short new finding at a previous finding's place is matched to it when
+  all its content words appear in the old text: the overlap is measured
+  against the shorter text, and the place clause has no word floor. The new
+  text is lost, and the old finding's severity is counted, a rule-B minor
+  included (review `ea8c1752`; deferred by operator decision 51, 16.10).
+- In a merge of three or more copies, a copy's rule-B claim that ties on the
+  keys merged so far is dropped. When the security key arrives with a later
+  copy, reviewer order still decides between minor and major (reviews
+  `436ade33`, `f9ba85e1`; deferred by operator decision 51, 16.10).
+- A `lowered_from` such as `"none"`, `"n/a"`, `false` or `0` counts as
+  blocker, by design (fail-closed). A reviewer that writes one on a finding
+  it did not lower turns a minor into a BLOCK (review `79d1dc97`; deferred by
+  operator decision 51, 16.10).
+- The rule that a blank `lowered_from` is no lowering lives only in plan
+  dedup. A `--record` input that bypasses dedup with `lowered_from: ""` counts
+  as blocker (review `2e7afd61`; deferred by operator decision 51, 16.10).
+- When the plan has not changed since the previous round, the gate counts
+  the round fully, and a previous finding that no reviewer reports again
+  leaves the count without being marked resolved. This predates the critic
+  loop's diff mode (review `4c340d4a`; deferred by operator decision 51,
+  16.10).
 
 ## v6.3.1 — 2026-10-11 — Fixes from the release review of 6.3.0, and two verdict-gate holes closed