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/sqlite/Cargo.toml

@@ -12,8 +12,6 @@ sqlx = { version = "0.8.6", features = [
 ] }
 
 domain = { workspace = true }
-activitypub = { workspace = true }
-activitypub-base = { workspace = true }
 anyhow = { workspace = true }
 uuid = { workspace = true }
 chrono = { workspace = true }

crates/adapters/sqlite/src/lib.rs

@@ -12,7 +12,6 @@ use domain::{
 };
 use sqlx::SqlitePool;
 
-mod federation;
 mod migrations;
 mod models;
 mod users;
@@ -22,7 +21,6 @@ use models::{
     UserTotalsRow, datetime_to_str,
 };
 
-pub use federation::SqliteFederationRepository;
 pub use users::SqliteUserRepository;
 
 fn format_year_month(ym: &str) -> String {