docs(rest): name the 503 row and add the partial-judgement row in the released 2fc3fce CHANGELOG entry

packages/rest/CHANGELOG.md

@@ -657,7 +657,8 @@
 
   Moved for every caller:
 
-  - a holder whose own exact-qualifier read refuses cannot be judged for any caller, one admitted to every holder included, so the row above applies to it. Where every holder's own read refuses, `409` naming every holder → `503 SERVICE_UNAVAILABLE` for every caller, for as long as those reads refuse;
+  - a holder whose own exact-qualifier read refuses cannot be judged for any caller, one admitted to every holder included, and counts as a holder whose admission cannot be judged (the `503` row of the list above). Where every holder's own read refuses, `409` naming every holder → `503 SERVICE_UNAVAILABLE` for every caller, for as long as those reads refuse;
+  - where only some holders' own reads refuse, a caller admitted to every holder: `409` naming every holder → `409` naming only the holders that could be judged, when two or more of them remain or the refusal is not an ambiguity; otherwise the `503` row applies;
   - a holder whose saved dataset does not parse counts for no caller, as in `query_dataset`. Where two holders were in contention and only one parses, `409` naming both → `200` for a caller who may query the one that parses (it runs), and → `404 NOT_FOUND` for any other caller.
 
   Unchanged: a name the read resolves (one holder, the caller package's own or closure item, an exact `?package=` hit) keeps its answer, including `403` from the query's own read gates for a caller not admitted to it, and it never falls through to another package's dataset of the same name. Two refusals are not judged and still name every holder: one from a service whose admission is not the plugin-wired set, and one that names the environment or the platform as a candidate. No fix needed from callers.