feat(api): expand API endpoints for repo, PR, user, workspace management

- Add git operation endpoints: archive, compare branches, diff, tree,
  repository extras
- Add repo endpoints: contributors, delete fork, get branch/commit
  status/deploy key/invitation/member/release/tag/webhook, topics,
  release assets, webhook deliveries/retry
- Add PR endpoints: review requests, templates
- Add user endpoints: block/unblock, follow/unfollow, presence,
  personal access tokens, account restore
- Add workspace endpoints: billing history, approvals, domains,
  integrations, invitations, members, webhooks, restore
- Add internal API, notification API, IM API modules
- Update route configuration and OpenAPI spec

api/workspace/restore.rs

@@ -0,0 +1,36 @@
+use actix_web::{HttpResponse, web};
+
+use crate::api::response::{ApiEmptyResponse, ApiErrorResponse};
+use crate::error::AppError;
+use crate::service::AppService;
+use crate::session::Session;
+
+#[utoipa::path(
+    post,
+    path = "/api/v1/workspaces/{workspace_name}/restore",
+    tag = "Workspaces",
+    operation_id = "workspaceRestore",
+    summary = "Restore a soft-deleted workspace",
+    description = "Restore a workspace that was previously soft-deleted. Requires owner role.",
+    params(
+        ("workspace_name" = String, Path, description = "Workspace name.")
+    ),
+    responses(
+        (status = 200, description = "Workspace restored.", body = ApiEmptyResponse),
+        (status = 401, description = "Unauthenticated or insufficient role.", body = ApiErrorResponse),
+        (status = 404, description = "Workspace not found or not deleted.", body = ApiErrorResponse),
+        (status = 500, description = "Database transaction failed.", body = ApiErrorResponse)
+    )
+)]
+pub async fn restore_workspace(
+    service: web::Data<AppService>,
+    session: Session,
+    path: web::Path<String>,
+) -> Result<HttpResponse, AppError> {
+    let ws_name = path.into_inner();
+    service
+        .workspace
+        .workspace_restore(&session, &ws_name)
+        .await?;
+    Ok(HttpResponse::Ok().json(ApiEmptyResponse::ok("workspace restored")))
+}