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/src/handler.rs

@@ -1,5 +1,8 @@
 use anyhow::{anyhow, Result};
 use async_trait::async_trait;
+
+const USERS_PATH_PREFIX: &str = "/users/";
+const THOUGHTS_PATH_PREFIX: &str = "/thoughts/";
 use chrono::{DateTime, Utc};
 use std::sync::Arc;
 use url::Url;
@@ -172,7 +175,7 @@ impl ApObjectHandler for ThoughtsObjectHandler {
             }
             let user_uuid = href_url
                 .path()
-                .strip_prefix("/users/")
+                .strip_prefix(USERS_PATH_PREFIX)
                 .and_then(|s| s.split('/').next())
                 .and_then(|s| uuid::Uuid::parse_str(s).ok());
             if let Some(uuid) = user_uuid {
@@ -217,7 +220,7 @@ impl ApObjectHandler for ThoughtsObjectHandler {
     async fn on_like(&self, object_url: &Url, actor_url: &Url) -> Result<()> {
         let thought_uuid = object_url
             .path()
-            .strip_prefix("/thoughts/")
+            .strip_prefix(THOUGHTS_PATH_PREFIX)
             .and_then(|s| s.split('/').next())
             .and_then(|s| uuid::Uuid::parse_str(s).ok());
 
@@ -280,7 +283,7 @@ impl ApObjectHandler for ThoughtsObjectHandler {
 
         let thought_uuid = thought_ap_id
             .path()
-            .strip_prefix("/thoughts/")
+            .strip_prefix(THOUGHTS_PATH_PREFIX)
             .and_then(|s| s.split('/').next())
             .and_then(|s| uuid::Uuid::parse_str(s).ok());
 
@@ -305,7 +308,7 @@ impl ApObjectHandler for ThoughtsObjectHandler {
     async fn on_announce_received(&self, object_url: &Url, actor_url: &Url) -> Result<()> {
         let thought_uuid = object_url
             .path()
-            .strip_prefix("/thoughts/")
+            .strip_prefix(THOUGHTS_PATH_PREFIX)
             .and_then(|s| s.split('/').next())
             .and_then(|s| uuid::Uuid::parse_str(s).ok());