keep tile outlines honest when the anchor tile fails to load

A building or grounds outline from tiles now needs the tile holding the
anchor: when that tile fails and only neighbours load, no neighbouring
building or area stands in. Nominatim name tags holding several
";"-separated names match each name. Document recovery from a stuck
public-Nominatim dispatch marker, correct the phone credit comment,
drive the slow-device queue test with a mocked performance clock, and
credit GitHub handles in the changelog.

server/providers/regional/outlineSelect.js

@@ -276,8 +276,10 @@ function outlineNameMatches(row, query, kind) {
   };
   add(row?.name);
   add(String(row?.display_name || '').split(',')[0]);
+  // OSM name tags may hold several names separated by ";" ("York;Eboracum").
   if (row?.namedetails && typeof row.namedetails === 'object')
-    for (const value of Object.values(row.namedetails)) add(value);
+    for (const value of Object.values(row.namedetails))
+      for (const part of String(value ?? '').split(';')) add(part);
   if (kind === 'city' || kind === 'admin' || kind === 'neighborhood') {
     const head = normalizePlaceName(String(query ?? '').split(',')[0]);
     return Boolean(head) && names.has(head);