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/merge_strategy.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::PrMergeStrategy;
-use crate::service::pr::merge_strategy::UpdateMergeStrategyParams;
 use crate::service::AppService;
+use crate::service::pr::merge_strategy::UpdateMergeStrategyParams;
 use crate::session::Session;
 
 #[derive(Debug, Deserialize, IntoParams)]
@@ -92,7 +92,13 @@ pub async fn update_merge_strategy(
 ) -> Result<HttpResponse, AppError> {
     let strategy = service
         .pr
-        .pr_update_merge_strategy(&session, &path.workspace_name, &path.repo_name, path.number, params.into_inner())
+        .pr_update_merge_strategy(
+            &session,
+            &path.workspace_name,
+            &path.repo_name,
+            path.number,
+            params.into_inner(),
+        )
         .await?;
     Ok(HttpResponse::Ok().json(ApiResponse::new(strategy)))
 }