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/activitypub/Cargo.toml

@@ -14,7 +14,6 @@ chrono = { workspace = true }
 anyhow = { workspace = true }
 tracing = { workspace = true }
 async-trait = { workspace = true }
-event-publisher = { workspace = true }
 
 activitypub_federation = "0.7.0-beta.11"
 url = { version = "2", features = ["serde"] }