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/user/list_gpg_keys.rs

@@ -1,4 +1,6 @@
 use actix_web::{HttpResponse, web};
+use serde::Deserialize;
+use utoipa::IntoParams;
 
 use crate::api::response::{ApiErrorResponse, ApiResponse};
 use crate::error::AppError;
@@ -6,6 +8,12 @@ use crate::models::users::UserGpgKey;
 use crate::service::AppService;
 use crate::session::Session;
 
+#[derive(Debug, Deserialize, IntoParams)]
+pub struct QueryParams {
+    pub limit: Option<i64>,
+    pub offset: Option<i64>,
+}
+
 /// List user GPG keys
 ///
 /// Returns all GPG public keys registered by the authenticated user.
@@ -17,6 +25,7 @@ use crate::session::Session;
     path = "/api/v1/user/keys/gpg",
     tag = "User",
     operation_id = "userListGpgKeys",
+    params(QueryParams),
     responses(
         (status = 200, description = "GPG keys listed successfully. Returns array of GPG key objects with fingerprints and metadata.", body = ApiResponse<Vec<UserGpgKey>>),
         (status = 401, description = "Authentication required or session expired", body = ApiErrorResponse),
@@ -29,7 +38,15 @@ use crate::session::Session;
 pub async fn list_gpg_keys(
     service: web::Data<AppService>,
     session: Session,
+    query: web::Query<QueryParams>,
 ) -> Result<HttpResponse, AppError> {
-    let keys = service.user.user_gpg_keys(&session).await?;
+    let keys = service
+        .user
+        .user_gpg_keys(
+            &session,
+            query.limit.unwrap_or(50),
+            query.offset.unwrap_or(0),
+        )
+        .await?;
     Ok(HttpResponse::Ok().json(ApiResponse::new(keys)))
 }