fix: count every mapped installation in tool answers

The installation source keeps one named site per display cell for the map.
Queries now ask for every site and the exact box, and report when the
source returned only part of the mapped sites.

src/tools/queries/environment.test.mjs

@@ -263,10 +263,14 @@ test('terrain heights are returned in request order', async () => {
 
 test('military installations need a bounded area and are nearest first', async () => {
   const requested = [];
+  const options = [];
+  let saturated = false;
   const installations = {
-    async getMappedSites(box) {
+    async getMappedSites(box, { signal, ...rest } = {}) {
       requested.push(box);
+      options.push(rest);
       return {
+        saturated,
         source: 'OpenStreetMap',
         records: [
           {
@@ -302,7 +306,18 @@ test('military installations need a bounded area and are nearest first', async (
     ['osm:2', 'osm:1'],
   );
   assert.equal(result.data.source, 'OpenStreetMap');
+  assert.equal(result.data.complete, true);
   assert.ok(requested[0].north - requested[0].south < 1);
+  assert.deepEqual(options[0], { exact: true, thinned: false });
+  saturated = true;
+  const partial = await catalog.call('find_military_installations', {
+    area: { lat: 32.7, lon: -117.2, radius_km: 20 },
+  });
+  assert.equal(partial.data.complete, false);
+  assert.match(
+    partial.summary,
+    /\(partial: the source returned only some sites\)\.$/,
+  );
   await assert.rejects(
     catalog.call('find_military_installations', {
       area: { bbox: [-130, 20, -100, 50] },