Refactor ActivityPub integration and add SQLite federation support

- Removed event-publisher dependency from Cargo.lock and Cargo.toml.
- Introduced sqlite-federation crate with necessary dependencies and implementation.
- Updated activitypub crate to use new ActivityPubPort trait for better abstraction.
- Refactored event handling to utilize domain ports instead of direct dependencies.
- Adjusted presentation layer to accommodate new ActivityPub service structure.
- Removed unused test setup for ActivityPub service in favor of NoopActivityPubService.
- Cleaned up SQLite adapter to remove unnecessary dependencies and streamline functionality.

crates/presentation/src/event_handlers.rs

@@ -3,7 +3,7 @@ use std::time::Duration;
 use application::{commands::SyncPosterCommand, context::AppContext, use_cases::sync_poster};
 use async_trait::async_trait;
 use domain::{errors::DomainError, events::DomainEvent};
-use event_publisher::EventHandler;
+use domain::ports::EventHandler;
 
 pub struct PosterSyncHandler {
     ctx: AppContext,