feat(notifications): Add bot owner notifications for interactions

- Create new botOwnerNotify module with notifyBotOwnerForPost and notifyBotOwnerForFollow functions
- Add bot owner notifications to local post interactions (likes, reposts)
- Add bot owner notifications to swarm post interactions (likes, reposts, mentions)
- Add bot owner notifications to follow interactions (local and swarm)
- Implement mention notification creation for local mentions in post creation
- Notify bot owners when their bots receive interactions from other users
- Ensure bot owners are alerted to engagement on their bot accounts across federated network

src/app/api/swarm/interactions/mention/route.ts

@@ -94,6 +94,10 @@ export async function POST(request: NextRequest) {
       type: 'mention',
     });
 
+    // Also notify bot owner if this is a bot being mentioned
+    const { notifyBotOwnerForPost } = await import('@/lib/notifications/botOwnerNotify');
+    await notifyBotOwnerForPost(mentionedUser.id, remoteUser.id, 'mention', post.id);
+
     console.log(`[Swarm] Received mention from ${remoteHandle} for @${data.mentionedHandle}`);
 
     return NextResponse.json({