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/posts/[id]/like/route.ts

@@ -83,6 +83,10 @@ export async function POST(request: Request, context: RouteContext) {
                 postId,
                 type: 'like',
             });
+
+            // Also notify bot owner if this is a bot's post
+            const { notifyBotOwnerForPost } = await import('@/lib/notifications/botOwnerNotify');
+            await notifyBotOwnerForPost(post.userId, user.id, 'like', postId);
         }
 
         // SWARM-FIRST: Check if this is a swarm post and deliver directly

src/app/api/posts/[id]/repost/route.ts

@@ -93,6 +93,10 @@ export async function POST(request: Request, context: RouteContext) {
                 postId,
                 type: 'repost',
             });
+
+            // Also notify bot owner if this is a bot's post
+            const { notifyBotOwnerForPost } = await import('@/lib/notifications/botOwnerNotify');
+            await notifyBotOwnerForPost(originalPost.userId, user.id, 'repost', postId);
         }
 
         // SWARM-FIRST: Deliver repost to swarm node