docs(spec): the dataset carrier's $ne note states what ruling A on #19886 now refuses

#20204 refuses a list under $ne at the shared face and at
FieldOperatorsSchema.$ne; the save door does not judge it yet (#20116).
The docblock and one test label said no ruling decided it. Wording only.

Co-authored-by: Claude <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QcAS3qiYYZNezaxZxaUdMV

Author: claude

packages/spec/src/ui/dataset-filter-nested-relation-list.test.ts

@@ -206,7 +206,7 @@ describe('#20080 §4 — what a nested relation may still carry', () => {
     ['$in: [] stays the declared predicate', { account: { region: { $in: [] } } }],
     ['$nin keeps its list', { account: { region: { $nin: ['a'] } } }],
     ['$between keeps its pair', { account: { score: { $between: [1, 9] } } }],
-    ['$ne carrying a list — no ruling decides it', { account: { region: { $ne: ['a'] } } }],
+    ['$ne carrying a list — refused at the shared face (ruling A, #19886), not yet at this save door (#20116)', { account: { region: { $ne: ['a'] } } }],
     ['a scalar under $and', { $and: [{ account: { region: 'a' } }] }],
   ])('%s', (_label, filter) => {
     const scoped = DatasetSchema.safeParse(withScope(filter));

packages/spec/src/ui/dataset.zod.ts

@@ -156,7 +156,11 @@ function isAnalyticsNestedRelationSpec(spec: unknown): spec is Record<string, un
  * `path` carries it (`filter.account.region`,
  * `measures.0.filter.account.region.$eq`).
  *
- * ⛔ Not judged here: `$ne` carrying a list (no ruling decides it); the list
+ * ⛔ Not judged here: `$ne` carrying a list — refused at the shared comparand
+ * face and at `FieldOperatorsSchema.$ne` under ruling A on #19886 (record
+ * 5805254639), and on the analytics door's hand-over of a nested entry, but
+ * not yet at this save door or `FilterConditionSchema`'s: that stored-filter
+ * arm is #20116's (moved there by record 5854888976); the list
  * operators, which keep their lists (`$in: []` / `$nin: []` included); every
  * scalar, `null` included; and the face's OTHER arms inside a nested relation
  * (a malformed `$in`, a `null` ordering comparand, a `$between` endpoint),