fix: keep listening on default index+search relays for users with no kind 10002

When pickRelaysToLoadUsers exhausts every candidate tier (outbox / hints /
index / search / connected / common) for a user without finding kind 10002,
it returns an empty map and the REQ closes. A late-published relay list
from that user would never reach the UI for the rest of the session
(unless EOSEAccountFast's LRU evicts the entry).

Compute the set of users we couldn't place this pass and add a permanent
fallback filter on DefaultIndexerRelayList + DefaultSearchRelayList. The
filter is deterministic (sorted authors, set-based relays) so the relay
client de-duplicates it across passes, keeping the REQ open without
re-sending — any future kind 0 / kind 10002 publication will be pushed
to us live.

Offline relays are subtracted via failureTracker.cannotConnectRelays.

amethyst/src/main/java/com/vitorpamplona/amethyst/service/relayClient/reqCommand/user/loaders/UserOutboxFinderSubAssembler.kt

@@ -20,12 +20,15 @@
  */
 package com.vitorpamplona.amethyst.service.relayClient.reqCommand.user.loaders
 
+import com.vitorpamplona.amethyst.commons.defaults.DefaultIndexerRelayList
+import com.vitorpamplona.amethyst.commons.defaults.DefaultSearchRelayList
 import com.vitorpamplona.amethyst.commons.relayClient.eoseManagers.BaseEoseManager
 import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.amethyst.model.User
 import com.vitorpamplona.amethyst.service.relayClient.reqCommand.account.follows.pickRelaysToLoadUsers
 import com.vitorpamplona.amethyst.service.relayClient.reqCommand.user.UserFinderQueryState
 import com.vitorpamplona.amethyst.service.relays.EOSEAccountFast
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
 import com.vitorpamplona.quartz.nip01Core.metadata.MetadataEvent
 import com.vitorpamplona.quartz.nip01Core.relay.client.INostrClient
 import com.vitorpamplona.quartz.nip01Core.relay.client.accessories.RelayOfflineTracker
@@ -107,16 +110,46 @@ class UserOutboxFinderSubAssembler(
                 hasTried,
             )
 
-        return perRelayKeysBoth.mapNotNull {
-            val sortedUsers = it.value.sorted()
-            if (sortedUsers.isNotEmpty()) {
-                RelayBasedFilter(
-                    relay = it.key,
-                    filter = Filter(kinds = relayListKinds, authors = sortedUsers),
-                )
-            } else {
-                null
+        val activeFilters =
+            perRelayKeysBoth.mapNotNull {
+                val sortedUsers = it.value.sorted()
+                if (sortedUsers.isNotEmpty()) {
+                    RelayBasedFilter(
+                        relay = it.key,
+                        filter = Filter(kinds = relayListKinds, authors = sortedUsers),
+                    )
+                } else {
+                    null
+                }
             }
-        }
+
+        // Users that pickRelaysToLoadUsers could not place anywhere this pass:
+        // every candidate relay tier (outbox/hints/index/search/connected/common)
+        // is already in hasTried. Without a fallback they'd be silently dropped
+        // and a late-published kind 10002 would never reach the UI.
+        val placedPubkeys =
+            perRelayKeysBoth.values
+                .asSequence()
+                .flatten()
+                .toSet()
+        val abandonedPubkeys =
+            noOutboxList.mapNotNullTo(mutableSetOf<HexKey>()) { user ->
+                user.pubkeyHex.takeIf { it !in placedPubkeys }
+            }
+
+        if (abandonedPubkeys.isEmpty()) return activeFilters
+
+        val sortedAbandoned = abandonedPubkeys.sorted()
+        val fallbackRelays =
+            (DefaultIndexerRelayList + DefaultSearchRelayList) - failureTracker.cannotConnectRelays
+        val fallbackFilters =
+            fallbackRelays.map { relay ->
+                RelayBasedFilter(
+                    relay = relay,
+                    filter = Filter(kinds = relayListKinds, authors = sortedAbandoned),
+                )
+            }
+
+        return activeFilters + fallbackFilters
     }
 }