fix: record relay attribution for repost and community-approval notes

Non-chat audit follow-up: RepostEvent, GenericRepostEvent, and
CommunityPostApprovalEvent consumes never called note.addRelay, so those
notes carried an empty relay list forever.

- CommunityPostApprovalEvent is badge-rendered directly in community feeds
  (BadgeBox has no repost-style indirection for it), so its relay icon row
  was always empty.
- Repost badges borrow the boosted note's relays in BadgeBox, but the
  repost note's own list feeds relayHintUrl()/relayUrls() for nevent hints
  when citing or sharing the repost — those fell back to author outbox
  guesses.

Add the standard attribution block (author.addRelayBeingUsed +
note.addRelay) before the duplicate check, matching consumeRegularEvent,
so both first arrivals and re-deliveries from other relays are recorded.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YEiq1NMK3q12KGQ2yYhPEp

amethyst/src/main/java/com/vitorpamplona/amethyst/model/LocalCache.kt

@@ -1466,6 +1466,11 @@ object LocalCache : ILocalCache, ICacheProvider {
     ): Boolean {
         val note = getOrCreateNote(event.id)
 
+        if (relay != null) {
+            getOrCreateUser(event.pubKey).addRelayBeingUsed(relay, event.createdAt)
+            note.addRelay(relay)
+        }
+
         // Already processed this event.
         if (note.event != null) return false
 
@@ -1496,6 +1501,11 @@ object LocalCache : ILocalCache, ICacheProvider {
     ): Boolean {
         val note = getOrCreateNote(event.id)
 
+        if (relay != null) {
+            getOrCreateUser(event.pubKey).addRelayBeingUsed(relay, event.createdAt)
+            note.addRelay(relay)
+        }
+
         // Already processed this event.
         if (note.event != null) return false
 
@@ -1527,6 +1537,14 @@ object LocalCache : ILocalCache, ICacheProvider {
     ): Boolean {
         val note = getOrCreateNote(event.id)
 
+        // Approval notes are badge-rendered directly in community feeds
+        // (BadgeBox has no repost-style indirection for them), so without
+        // this attribution their relay list stays empty forever.
+        if (relay != null) {
+            getOrCreateUser(event.pubKey).addRelayBeingUsed(relay, event.createdAt)
+            note.addRelay(relay)
+        }
+
         // Already processed this event.
         if (note.event != null) return false