fix(military): retire unavailable history and keep local trails

src/layers/military/tracking.js

@@ -593,7 +593,7 @@ export function createTracking({
   }
 
   /**
-   * Fire-and-forget adsb.lol readsb trace backfill (PRD F2). Trace points are
+   * Fire-and-forget optional source history backfill (PRD F2). Trace points are
    * stride-thinned to the remaining vertex budget, then spliced strictly older
    * than the oldest seeded fix AHEAD of the locally accumulated fine segment,
    * capped at TRAIL_MAX_POINTS (newest kept). Any failure (404/timeout/

src/sources/live/contract.test.mjs

@@ -214,11 +214,10 @@ test('construction is inert; adapters preserve routes, viewport query, cache epo
   assert.equal(mil.observedAtMs, now - 60000);
   assert.equal(mil.records[0].positionTimeMs, now - 75000);
   assert.equal(mil.stale, true);
-  const track = await military.getTrack('abc123');
-  assert.equal(track.complete, false);
-  assert.equal(track.records[0].observedAtMs, now - 50000);
-  assert.equal(track.records[0].baroAltitudeM, 304.8);
-  assert.equal(track.records[0].ellipsoidAltitudeM, null);
+  assert.equal(military.getTrack, undefined);
+  assert.ok(
+    requests.every(({ url }) => !url.startsWith('/api/military/track')),
+  );
 });
 
 test('cancellation after slow body parsing rejects even with a transport that ignores abort', async () => {

src/sources/live/standalone.js

@@ -159,26 +159,8 @@ export function createMilitarySource({
         status: response.status,
       };
     },
-    async getTrack(reference, { signal } = {}) {
-      const { response, payload } = await readResponse(
-        fetchImpl,
-        '/api/military/track?hex=' + encodeURIComponent(reference),
-        { signal },
-        'Military aircraft',
-      );
-      if (!response.ok) throw httpError(response, 'Military aircraft');
-      const baseTimeMs = epoch(payload?.timestamp, 1000);
-      return {
-        records:
-          baseTimeMs == null
-            ? []
-            : normalizeAircraftTrack(payload?.trace, {
-                baseTimeMs,
-                readsb: true,
-              }),
-        complete: false,
-      };
-    },
+    // ADSB.lol does not expose a supported live-history endpoint. Omitting
+    // optional getTrack keeps the tracking layer on its accumulated trail.
   };
 }
 

src/tooling/liveProviders.test.mjs

@@ -583,3 +583,21 @@ test('track backfill proxy returns 502 on an oversized upstream body and caches
   assert.equal(res2.statusCode, 502);
   assert.equal(callCount, 1);
 });
+
+test('retired military history refuses without upstream I/O while validating identifiers', async (t) => {
+  t.mock.method(globalThis, 'fetch', async () => {
+    assert.fail('retired history must not contact the upstream');
+  });
+  const route = install(providers.trackBackfillProxies());
+  for (const hex of ['abc123', 'abc456']) {
+    const response = await route('/api/military/track', '?hex=' + hex);
+    assert.equal(response.statusCode, 503);
+    assert.equal(JSON.parse(response.body).code, 'history_unavailable');
+    assert.equal(response.headers['retry-after'], '1800');
+    assert.equal(response.headers['cache-control'], 'no-store');
+  }
+  assert.equal(
+    (await route('/api/military/track', '?hex=invalid')).statusCode,
+    400,
+  );
+});