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/adapters/event-publisher/src/lib.rs

@@ -2,6 +2,8 @@ use async_trait::async_trait;
 use domain::{errors::DomainError, events::DomainEvent, ports::EventPublisher};
 use tokio::sync::mpsc;
 
+pub use domain::ports::EventHandler;
+
 pub struct EventPublisherConfig {
     pub channel_buffer: usize,
 }
@@ -16,11 +18,6 @@ impl EventPublisherConfig {
     }
 }
 
-#[async_trait]
-pub trait EventHandler: Send + Sync {
-    async fn handle(&self, event: &DomainEvent) -> Result<(), DomainError>;
-}
-
 pub struct ChannelEventPublisher {
     sender: mpsc::Sender<DomainEvent>,
 }