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.

Cargo.lock

@@ -12,7 +12,6 @@ dependencies = [
  "async-trait",
  "chrono",
  "domain",
- "event-publisher",
  "serde",
  "serde_json",
  "tokio",
@@ -3066,6 +3065,7 @@ dependencies = [
  "serde",
  "serde_json",
  "sqlite",
+ "sqlite-federation",
  "sqlx",
  "template-askama",
  "thiserror 2.0.18",
@@ -4019,6 +4019,20 @@ dependencies = [
 [[package]]
 name = "sqlite"
 version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "async-trait",
+ "chrono",
+ "domain",
+ "sqlx",
+ "tokio",
+ "tracing",
+ "uuid",
+]
+
+[[package]]
+name = "sqlite-federation"
+version = "0.1.0"
 dependencies = [
  "activitypub",
  "activitypub-base",
@@ -4027,7 +4041,6 @@ dependencies = [
  "chrono",
  "domain",
  "sqlx",
- "tokio",
  "tracing",
  "uuid",
 ]