Refactor database error handling across repositories to use IntoDbResult for improved error management

- Updated PgNotificationRepository to utilize IntoDbResult for error handling in various methods.
- Refactored PgRemoteActorRepository to replace manual error mapping with IntoDbResult.
- Modified PgRemoteActorConnectionRepository to implement IntoDbResult for error handling.
- Adjusted PgTagRepository to use IntoDbResult for consistent error management.
- Introduced test_helpers module for seeding users and thoughts in tests.
- Enhanced PgThoughtRepository to leverage IntoDbResult for error handling.
- Updated PgTopFriendRepository to utilize IntoDbResult for error management.
- Refactored PgUserRepository to implement IntoDbResult for error handling.
- Added constants for pagination defaults in requests.
- Introduced MAX_TOP_FRIENDS constant for top friends validation.
- Refactored JWT expiration time to use a constant.
- Improved rate limiter configuration with constants for better readability.
- Added utility methods for FollowState and Visibility enums for string conversions.
- Introduced maximum length constants for Username, Email, and Content value objects.
- Cleaned up test modules by removing redundant code and utilizing a shared testing state.

crates/presentation/src/handlers/federation_actors.rs

@@ -92,63 +92,10 @@ async fn actor_connections_handler(
 #[cfg(test)]
 mod tests {
     use super::*;
-    use async_trait::async_trait;
+    use crate::testing::make_state;
     use axum::{body::Body, http::Request, routing::get, Router};
-    use domain::{
-        errors::DomainError,
-        ports::{AuthService, GeneratedToken, PasswordHasher},
-        testing::TestStore,
-        value_objects::{PasswordHash, UserId},
-    };
-    use std::sync::Arc;
     use tower::ServiceExt;
 
-    struct NoOpAuth;
-    impl AuthService for NoOpAuth {
-        fn generate_token(&self, _uid: &UserId) -> Result<GeneratedToken, DomainError> {
-            Err(DomainError::Internal("noop".into()))
-        }
-        fn validate_token(&self, _token: &str) -> Result<UserId, DomainError> {
-            Err(DomainError::Unauthorized)
-        }
-    }
-
-    struct NoOpHasher;
-    #[async_trait]
-    impl PasswordHasher for NoOpHasher {
-        async fn hash(&self, _plain: &str) -> Result<PasswordHash, DomainError> {
-            Err(DomainError::Internal("noop".into()))
-        }
-        async fn verify(&self, _plain: &str, _hash: &PasswordHash) -> Result<bool, DomainError> {
-            Ok(false)
-        }
-    }
-
-    fn make_state() -> crate::state::AppState {
-        let store = Arc::new(TestStore::default());
-        crate::state::AppState {
-            users: store.clone(),
-            thoughts: store.clone(),
-            likes: store.clone(),
-            boosts: store.clone(),
-            follows: store.clone(),
-            blocks: store.clone(),
-            tags: store.clone(),
-            api_keys: store.clone(),
-            top_friends: store.clone(),
-            notifications: store.clone(),
-            remote_actors: store.clone(),
-            feed: store.clone(),
-            search: store.clone(),
-            auth: Arc::new(NoOpAuth),
-            hasher: Arc::new(NoOpHasher),
-            events: store.clone(),
-            federation: store.clone(),
-            ap_repo: store.clone(),
-            remote_actor_connections: store.clone(),
-        }
-    }
-
     fn app() -> Router {
         Router::new()
             .route(