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.

src/ui/mobileShell.test.mjs

@@ -500,8 +500,8 @@ test('the phone shell keeps the required attribution visible', () => {
     /display:\s*none|visibility:\s*hidden|opacity:\s*0/,
   );
   // A long credit line (map plus outline credits) wraps inside the screen:
-  // the box needs a real width for Cesium's absolutely positioned credit
-  // block, set before the 0.8 scale, so it is divided by it.
+  // it wraps, and the box gets a real width, set before the 0.8 scale, so it
+  // is divided by it.
   assert.match(idleCredit, /white-space: normal;/);
   assert.match(
     idleCredit,