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/activitypub-base/src/outbox.rs

@@ -9,9 +9,7 @@ use activitypub_federation::{
     protocol::context::WithContext,
 };
 
-use crate::{activities::CreateActivity, data::FederationData, error::Error};
-
-const PAGE_SIZE: usize = 20;
+use crate::{activities::CreateActivity, data::FederationData, error::Error, urls::AP_PAGE_SIZE};
 
 #[derive(Deserialize)]
 pub struct OutboxQuery {
@@ -66,7 +64,7 @@ pub async fn outbox_handler(
 
         let items = data
             .object_handler
-            .get_local_objects_page(uuid, before, PAGE_SIZE)
+            .get_local_objects_page(uuid, before, AP_PAGE_SIZE)
             .await
             .map_err(|e| Error::from(anyhow::anyhow!("{}", e)))?;
 
@@ -74,7 +72,7 @@ pub async fn outbox_handler(
             .parse()
             .expect("valid url");
 
-        let has_more = items.len() == PAGE_SIZE;
+        let has_more = items.len() == AP_PAGE_SIZE;
         let oldest_ts = items.last().map(|(_, _, ts)| *ts);
 
         let followers_url = format!("{}/followers", actor_url);
@@ -110,7 +108,7 @@ pub async fn outbox_handler(
         };
 
         Ok(axum::Json(OrderedCollectionPage {
-            context: "https://www.w3.org/ns/activitystreams".to_string(),
+            context: crate::urls::AP_CONTEXT.to_string(),
             kind: "OrderedCollectionPage".to_string(),
             id: page_id,
             part_of: outbox_url,
@@ -127,7 +125,7 @@ pub async fn outbox_handler(
             .len() as u64;
 
         Ok(axum::Json(OrderedCollection {
-            context: "https://www.w3.org/ns/activitystreams".to_string(),
+            context: crate::urls::AP_CONTEXT.to_string(),
             kind: "OrderedCollection".to_string(),
             id: outbox_url.clone(),
             total_items: total,