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/state.rs

@@ -1,6 +1,6 @@
 use std::sync::Arc;
 
-use activitypub::ActivityPubService;
+use activitypub::ActivityPubPort;
 use application::context::AppContext;
 
 use crate::ports::{HtmlRenderer, RssFeedRenderer};
@@ -10,5 +10,5 @@ pub struct AppState {
     pub app_ctx: AppContext,
     pub html_renderer: Arc<dyn HtmlRenderer>,
     pub rss_renderer: Arc<dyn RssFeedRenderer>,
-    pub ap_service: Arc<ActivityPubService>,
+    pub ap_service: Arc<dyn ActivityPubPort>,
 }