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/Cargo.toml

@@ -26,6 +26,7 @@ metadata = { workspace = true }
 poster-fetcher = { workspace = true }
 poster-storage = { workspace = true }
 sqlite = { workspace = true }
+sqlite-federation = { workspace = true }
 activitypub = { workspace = true }
 sqlx = { workspace = true }
 template-askama = { workspace = true }