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/adapters/postgres/src/notification.rs

@@ -1,3 +1,4 @@
+use crate::db_error::IntoDbResult;
 use async_trait::async_trait;
 use chrono::{DateTime, Utc};
 
@@ -53,7 +54,7 @@ impl NotificationRepository for PgNotificationRepository {
         .bind(n.from_user_id.as_ref().map(|u| u.as_uuid()))
         .bind(n.thought_id.as_ref().map(|t| t.as_uuid()))
         .bind(n.read).bind(n.created_at)
-        .execute(&self.pool).await.map_err(|e| DomainError::Internal(e.to_string())).map(|_| ())
+        .execute(&self.pool).await.into_domain().map(|_| ())
     }
 
     async fn list_for_user(
@@ -65,7 +66,7 @@ impl NotificationRepository for PgNotificationRepository {
             .bind(user_id.as_uuid())
             .fetch_one(&self.pool)
             .await
-            .map_err(|e| DomainError::Internal(e.to_string()))?;
+            .into_domain()?;
         #[derive(sqlx::FromRow)]
         struct Row {
             id: uuid::Uuid,
@@ -79,7 +80,7 @@ impl NotificationRepository for PgNotificationRepository {
         let rows = sqlx::query_as::<_, Row>(
             "SELECT id,user_id,type,from_user_id,thought_id,read,created_at FROM notifications WHERE user_id=$1 ORDER BY created_at DESC LIMIT $2 OFFSET $3"
         ).bind(user_id.as_uuid()).bind(page.limit()).bind(page.offset())
-        .fetch_all(&self.pool).await.map_err(|e| DomainError::Internal(e.to_string()))?;
+        .fetch_all(&self.pool).await.into_domain()?;
         let items = rows
             .into_iter()
             .map(|r| Notification {
@@ -107,7 +108,7 @@ impl NotificationRepository for PgNotificationRepository {
         .bind(user_id.as_uuid())
         .fetch_one(&self.pool)
         .await
-        .map_err(|e| DomainError::Internal(e.to_string()))?;
+        .into_domain()?;
         Ok(count as u64)
     }
 
@@ -117,7 +118,7 @@ impl NotificationRepository for PgNotificationRepository {
             .bind(user_id.as_uuid())
             .execute(&self.pool)
             .await
-            .map_err(|e| DomainError::Internal(e.to_string()))
+            .into_domain()
             .map(|_| ())
     }
 
@@ -126,7 +127,7 @@ impl NotificationRepository for PgNotificationRepository {
             .bind(user_id.as_uuid())
             .execute(&self.pool)
             .await
-            .map_err(|e| DomainError::Internal(e.to_string()))
+            .into_domain()
             .map(|_| ())
     }
 }