Wait for relay OK ack before marking SENT

- Quartz: expose pendingPublishRelaysFor(eventId) on INostrClient
- Worker: after publish(), poll pendingPublishRelaysFor every 500ms up
to OK_TIMEOUT_SEC=30s
- notify user when a scheduled post fires or fails

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip01Core/relay/client/INostrClient.kt

@@ -72,6 +72,13 @@ interface INostrClient : AutoCloseable {
         relayList: Set<NormalizedRelayUrl>,
     )
 
+    /**
+     * Returns the relays that have not yet acknowledged [eventId] with an OK,
+     * or null if the event is not tracked (never published, or already fully done).
+     * Use to poll for delivery confirmation after [publish].
+     */
+    fun pendingPublishRelaysFor(eventId: HexKey): Set<NormalizedRelayUrl>?
+
     fun addConnectionListener(listener: RelayConnectionListener)
 
     fun removeConnectionListener(listener: RelayConnectionListener)
@@ -123,6 +130,8 @@ class EmptyNostrClient : INostrClient {
         relayList: Set<NormalizedRelayUrl>,
     ) { }
 
+    override fun pendingPublishRelaysFor(eventId: HexKey): Set<NormalizedRelayUrl>? = null
+
     override fun addConnectionListener(listener: RelayConnectionListener) {}
 
     override fun removeConnectionListener(listener: RelayConnectionListener) {}

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip01Core/relay/client/NostrClient.kt

@@ -358,6 +358,8 @@ class NostrClient(
 
     override fun activeOutboxCache(url: NormalizedRelayUrl): Set<HexKey> = eventOutbox.activeOutboxCacheFor(url)
 
+    override fun pendingPublishRelaysFor(eventId: HexKey): Set<NormalizedRelayUrl>? = eventOutbox.pendingRelaysFor(eventId)
+
     override fun getReqFiltersOrNull(subId: String): Map<NormalizedRelayUrl, List<Filter>>? = activeRequests.getSubscriptionFiltersOrNull(subId)
 
     override fun getCountFiltersOrNull(subId: String): Map<NormalizedRelayUrl, List<Filter>>? = activeCounts.getSubscriptionFiltersOrNull(subId)

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip01Core/relay/client/pool/PoolEventOutbox.kt

@@ -90,6 +90,14 @@ class PoolEventOutbox {
         return myEvents
     }
 
+    /**
+     * Returns the relays that have NOT yet acknowledged [eventId] with an OK, or
+     * null if the event is not currently tracked (never sent or already fully done).
+     * Callers can poll this after publish to detect when relays ack: the set shrinks
+     * as OKs arrive, then the entry is removed from the outbox (returns null).
+     */
+    fun pendingRelaysFor(eventId: HexKey): Set<NormalizedRelayUrl>? = eventOutbox[eventId]?.relaysLeft()
+
     fun markAsSending(
         event: Event,
         relays: Set<NormalizedRelayUrl>,