feat(api): implement pull request assignees and check runs endpoints

- Add PR assignees API with list, assign, and unassign operations
- Add PR check runs API with create, update, list, and delete operations
- Implement workspace finding by ID method in core service
- Update .gitignore to include .env* files while preserving .env.example
- Reorder imports in multiple API files for consistency
- Format function calls with proper line breaks across PR-related APIs
- Add wiki revision comparison endpoint with proper schema definitions
- Integrate new API modules into main application setup
- Add health check, readiness probe, and OpenAPI endpoints to main server
- Configure session management and dependency injection in main application

api/pr/list.rs

@@ -1,12 +1,12 @@
-use actix_web::{web, HttpResponse};
+use actix_web::{HttpResponse, web};
 use serde::Deserialize;
 use utoipa::IntoParams;
 
-use crate::api::response::{ApiResponse, ApiErrorResponse};
+use crate::api::response::{ApiErrorResponse, ApiResponse};
 use crate::error::AppError;
 use crate::models::prs::PullRequest;
-use crate::service::pr::core::PrListFilters;
 use crate::service::AppService;
+use crate::service::pr::core::PrListFilters;
 use crate::session::Session;
 
 #[derive(Debug, Deserialize, IntoParams)]