fix: address cursor review findings

- Set streamInactivityTimeoutMs to 6s (above the 5s floor) in the
  E2E test so the inactivity timeout actually fires
- Remove redundant giveUp() call in #handleAckTimeout — RemoteManager
  is the sole caller via #onGiveUp callback

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: sirtimid

packages/kernel-node-runtime/test/e2e/libp2p-v3-features.test.ts

@@ -166,9 +166,11 @@ describe.sequential('libp2p v3 Features E2E', () => {
       'recovers communication after idle period exceeds inactivity timeout',
       async () => {
         // Use a short inactivity timeout to test the auto-abort behavior.
+        // Must be >= MIN_STREAM_INACTIVITY_TIMEOUT_MS (5 s) since the
+        // transport clamps lower values.
         const shortTimeoutOptions = {
           ...testBackoffOptions,
-          streamInactivityTimeoutMs: 2_000,
+          streamInactivityTimeoutMs: 6_000,
         };
 
         const { aliceRef, bobURL } = await setupAliceAndBob(
@@ -190,10 +192,10 @@ describe.sequential('libp2p v3 Features E2E', () => {
         );
         expect(initial).toContain('vat Bob got "hello" from Alice');
 
-        // Wait longer than the inactivity timeout (2s + buffer).
+        // Wait longer than the inactivity timeout (6s + buffer).
         // The stream should auto-abort due to inactivityTimeout,
         // triggering connection loss handling and reconnection.
-        await delay(4_000);
+        await delay(8_000);
 
         // Send another message — the transport layer should
         // reconnect since the previous stream was aborted by inactivity.

packages/ocap-kernel/src/remotes/kernel/RemoteHandle.ts

@@ -376,12 +376,11 @@ export class RemoteHandle implements EndpointHandle {
     }
 
     if (this.#retryCount >= MAX_RETRIES) {
-      // Give up - notify RemoteManager which calls giveUp() to reject
-      // pending messages, URL redemptions, and clear the ACK timer.
+      // Notify RemoteManager, which calls giveUp() to reject pending
+      // messages, URL redemptions, and clear the ACK timer.
       this.#logger.log(
         `${this.#peerId.slice(0, 8)}:: gave up after ${MAX_RETRIES} retries, rejecting ${this.#getPendingCount()} pending messages`,
       );
-      this.giveUp(`not acknowledged after ${MAX_RETRIES} retries`);
       this.#onGiveUp?.(this.#peerId);
       return;
     }