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 }