fix: rename cachedUrl to avoid conflict + AP parallelWorkers 5→2

patch-ap-account-lookup-cache-fallback: upstream fork already declares
`const cachedUrl` in GET /api/v1/accounts/:id (fix: ap actor cache commit),
causing a SyntaxError on deploy. Renamed to `actorCacheUrl` and added an
upstream-fix guard to skip gracefully when the upstream version is present.

indiekit.config.mjs: reduce AP parallelWorkers from 5 to 2 to lower
steady-state memory usage on the node jail.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

indiekit.config.mjs

@@ -402,7 +402,7 @@ export default {
     activityRetentionDays: 90,
     storeRawActivities: false,
     redisUrl,
-    parallelWorkers: 5,
+    parallelWorkers: 2,
     actorType: "Person",
     logLevel: activityPubLogLevel,
     debugDashboard: activityPubDebugDashboard,

scripts/patch-ap-account-lookup-cache-fallback.mjs

@@ -33,10 +33,10 @@ const OLD_SNIPPET = `    return res.status(404).json({ error: "Record not found"
 // ─── GET /api/v1/accounts/:id/statuses ──────────────────────────────────────`;
 
 const NEW_SNIPPET = `    // Check ap_actor_cache — populated by resolveRemoteAccount after search/lookup [patch] ap-account-lookup-cache-fallback
-    const cachedUrl = getActorUrlFromId(id)
+    const actorCacheUrl = getActorUrlFromId(id)
       || (collections.ap_actor_cache ? (await collections.ap_actor_cache.findOne({ _id: id }))?.actorUrl : null);
-    if (cachedUrl) {
-      const remoteAccount = await resolveRemoteAccount(cachedUrl, pluginOptions, baseUrl, collections);
+    if (actorCacheUrl) {
+      const remoteAccount = await resolveRemoteAccount(actorCacheUrl, pluginOptions, baseUrl, collections);
       if (remoteAccount) return res.json(remoteAccount);
     }
 
@@ -73,6 +73,13 @@ for (const filePath of candidates) {
     continue;
   }
 
+  // Upstream may have already added a cachedUrl block in GET /api/v1/accounts/:id
+  // (e.g. fix: ap actor cache commit). If so, the functionality is already present — skip.
+  if (source.includes("const cachedUrl = getActorUrlFromId(id)")) {
+    console.log(`[postinstall] patch-ap-account-lookup-cache-fallback: already fixed upstream in ${filePath}`);
+    continue;
+  }
+
   if (!source.includes(OLD_SNIPPET)) {
     console.warn(
       `[postinstall] patch-ap-account-lookup-cache-fallback: target snippet not found in ${filePath} — skipping`,