fix: reduce boost fetch failure logging from error to warning

Remote server timeouts during Announce.getObject() produced 20-line
stack traces. Now logs a single warning line with the cause code.
No behavior change — unreachable boosts were already skipped.

lib/inbox-listeners.js

@@ -340,7 +340,9 @@ export function registerInboxListeners(inboxChain, options) {
 
           await addTimelineItem(collections, timelineItem);
         } catch (error) {
-          console.error("Failed to store boosted timeline item:", error);
+          // Remote object unreachable (timeout, Authorized Fetch, deleted, etc.) — skip
+          const cause = error?.cause?.code || error?.message || "unknown";
+          console.warn(`[AP] Skipped boost from ${actorUrl}: ${cause}`);
         }
       }
     })

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@rmdes/indiekit-endpoint-activitypub",
-  "version": "2.0.8",
+  "version": "2.0.9",
   "description": "ActivityPub federation endpoint for Indiekit via Fedify. Adds full fediverse support: actor, inbox, outbox, followers, following, syndication, and Mastodon migration.",
   "keywords": [
     "indiekit",