fix: un dépôt est délivré une fois et retiré, comme en amont

packages/polyfill/test/continuous-inbox-observation.test.ts

@@ -325,7 +325,8 @@ describe("switching identity", () => {
     fake._deliver(inTransit);
     await converge();
 
-    // An inbox is not consumed by being ignored: connecting again drains what was left.
+    // An inbox is not consumed by being IGNORED — only by being applied. Alice never
+    // drained this one, so connecting again finds the deposit still queued.
     await signIn("alice");
     await converge();
 
@@ -348,15 +349,17 @@ describe("a deposit that cannot be applied", () => {
       await converge();
     });
 
-    expect(reported.filter((l) => /could not apply what is in this inbox/.test(l)).length)
+    expect(reported.filter((l) => /could not finish draining this inbox/.test(l)).length)
       .toBeGreaterThan(0);
     // Prefixed by the connected identity, like every other polyfill-layer line.
-    expect(reported.find((l) => /could not apply what is in this inbox/.test(l)))
+    expect(reported.find((l) => /could not finish draining this inbox/.test(l)))
       .toContain("[alice][polyfill]");
     expect(getCaps().capForHolder("alice", first.doc)).toBeUndefined();
 
     // The broker recovers. The observation is still running — one unapplicable item denies
-    // nothing — and the deposit that failed was never consumed, so both land now.
+    // nothing — and this deposit was never consumed, which since 2026-08-26 is a claim worth
+    // being precise about: what failed here is the READ, before anything could be taken out
+    // of the queue. A deposit that had been popped and whose ARM then failed would be gone.
     fake._failReadsOn.delete(aliceInbox);
     fake._deliver(second.inTransit);
     await converge();